I found these two suttas which I believe is important to remember.
“Mendicants, these five future perils have not currently arisen, but they will arise in the future. You should look out for them and try to give them up.
What five? In a future time there will be mendicants who like nice robes. They will neglect the practice of wearing rag robes and the practice of frequenting remote lodgings in the wilderness and the forest. They will come down to the villages, towns, and capital cities and make their homes there. And they will try to get robes in many kinds of wrong and inappropriate ways. This is the first future peril that has not currently arisen, but will arise in the future …
Furthermore, in a future time there will be mendicants who like nice almsfood. They will neglect the practice of walking for almsfood and the practice of frequenting remote lodgings in the wilderness and the forest. They will come down to the villages, towns, and capital cities and make their homes there. And they will try to get almsfood in many kinds of wrong and inappropriate ways. This is the second future peril that has not currently arisen, but will arise in the future …
Furthermore, in a future time there will be mendicants who like nice lodgings. They will neglect the practice of staying at the root of a tree and the practice of frequenting remote lodgings in the wilderness and the forest. They will come down to the villages, towns, and capital cities and make their homes there. And they will try to get lodgings in many kinds of wrong and inappropriate ways. This is the third future peril that has not currently arisen, but will arise in the future …
Furthermore, in a future time there will be mendicants who mix closely with nuns, trainee nuns, and novice nuns. In such conditions, it can be expected that they will lead the spiritual life dissatisfied, or commit one of the corrupt offenses, or reject the training and return to a lesser life. This is the fourth future peril that has not currently arisen, but will arise in the future …
Furthermore, in a future time there will be mendicants who mix closely with monastery attendants and novices. In such conditions it can be expected that they will engage in storing up goods for their own use, and making obvious hints about digging the earth and cutting plants. This is the fifth future peril that has not currently arisen, but will arise in the future …
These are the five future perils that have not currently arisen, but will arise in the future. You should look out for them and try to give them up.”
“Pañcimāni, bhikkhave, anāgatabhayāni etarahi asamuppannāni āyatiṁ samuppajjissanti. Tāni vo paṭibujjhitabbāni; paṭibujjhitvā ca tesaṁ pahānāya vāyamitabbaṁ.
Katamāni pañca? Bhavissanti, bhikkhave, bhikkhū anāgatamaddhānaṁ cīvare kalyāṇakāmā. Te cīvare kalyāṇakāmā samānā riñcissanti paṁsukūlikattaṁ, riñcissanti araññavanapatthāni pantāni senāsanāni; gāmanigamarājadhānīsu osaritvā vāsaṁ kappessanti, cīvarahetu ca anekavihitaṁ anesanaṁ appatirūpaṁ āpajjissanti. Idaṁ, bhikkhave, paṭhamaṁ anāgatabhayaṁ etarahi asamuppannaṁ āyatiṁ samuppajjissati. Taṁ vo paṭibujjhitabbaṁ; paṭibujjhitvā ca tassa pahānāya vāyamitabbaṁ.
Puna caparaṁ, bhikkhave, bhavissanti bhikkhū anāgatamaddhānaṁ piṇḍapāte kalyāṇakāmā. Te piṇḍapāte kalyāṇakāmā samānā riñcissanti piṇḍapātikattaṁ, riñcissanti araññavanapatthāni pantāni senāsanāni; gāmanigamarājadhānīsu osaritvā vāsaṁ kappessanti jivhaggena rasaggāni pariyesamānā, piṇḍapātahetu ca anekavihitaṁ anesanaṁ appatirūpaṁ āpajjissanti. Idaṁ, bhikkhave, dutiyaṁ anāgatabhayaṁ etarahi asamuppannaṁ āyatiṁ samuppajjissati. Taṁ vo paṭibujjhitabbaṁ; paṭibujjhitvā ca tassa pahānāya vāyamitabbaṁ.
Puna caparaṁ, bhikkhave, bhavissanti bhikkhū anāgatamaddhānaṁ senāsane kalyāṇakāmā. Te senāsane kalyāṇakāmā samānā riñcissanti rukkhamūlikattaṁ, riñcissanti araññavanapatthāni pantāni senāsanāni; Variant: rukkhamūlikattaṁ → āraññakattaṁ (sya-all, km)gāmanigamarājadhānīsu osaritvā vāsaṁ kappessanti, senāsanahetu ca anekavihitaṁ anesanaṁ appatirūpaṁ āpajjissanti. Idaṁ, bhikkhave, tatiyaṁ anāgatabhayaṁ etarahi asamuppannaṁ āyatiṁ samuppajjissati. Taṁ vo paṭibujjhitabbaṁ; paṭibujjhitvā ca tassa pahānāya vāyamitabbaṁ.
Puna caparaṁ, bhikkhave, bhavissanti bhikkhū anāgatamaddhānaṁ bhikkhunīsikkhamānāsamaṇuddesehi saṁsaṭṭhā viharissanti. Bhikkhunīsikkhamānāsamaṇuddesehi saṁsagge kho pana, bhikkhave, sati etaṁ pāṭikaṅkhaṁ: ‘anabhiratā vā brahmacariyaṁ carissanti, aññataraṁ vā saṅkiliṭṭhaṁ āpattiṁ āpajjissanti, sikkhaṁ vā paccakkhāya hīnāyāvattissanti’. Idaṁ, bhikkhave, catutthaṁ anāgatabhayaṁ etarahi asamuppannaṁ āyatiṁ samuppajjissati. Taṁ vo paṭibujjhitabbaṁ; paṭibujjhitvā ca tassa pahānāya vāyamitabbaṁ.
Puna caparaṁ, bhikkhave, bhavissanti bhikkhū anāgatamaddhānaṁ ārāmikasamaṇuddesehi saṁsaṭṭhā viharissanti. Ārāmikasamaṇuddesehi saṁsagge kho pana, bhikkhave, sati etaṁ pāṭikaṅkhaṁ: ‘anekavihitaṁ sannidhikāraparibhogaṁ anuyuttā viharissanti, oḷārikampi nimittaṁ karissanti, pathaviyāpi haritaggepi’. Idaṁ, bhikkhave, pañcamaṁ anāgatabhayaṁ etarahi asamuppannaṁ āyatiṁ samuppajjissati. Taṁ vo paṭibujjhitabbaṁ; paṭibujjhitvā ca tassa pahānāya vāyamitabbaṁ.
Imāni kho, bhikkhave, pañca anāgatabhayāni etarahi asamuppannāni āyatiṁ samuppajjissanti. Tāni vo paṭibujjhitabbāni; paṭibujjhitvā ca tesaṁ pahānāya vāyamitabban”ti.
SuttaCentral
“Mendicants, these five future perils have not currently arisen, but they will arise in the future. You should look out for them and try to give them up.
What five? In a future time there will be mendicants who have not developed their physical endurance, ethics, mind, and wisdom. They will ordain others, but be unable to guide them in the higher ethics, mind, and wisdom. They too will not develop their physical endurance, ethics, mind, and wisdom. They too will ordain others, but be unable to guide them in the higher ethics, mind, and wisdom. They too will not develop their physical endurance, ethics, mind, and wisdom. And that is how corrupt training comes from corrupt teachings, and corrupt teachings come from corrupt training. This is the first future peril that has not currently arisen, but will arise in the future …
Furthermore, in a future time there will be mendicants who have not developed their physical endurance, ethics, mind, and wisdom. They will give dependence to others, but be unable to guide them in the higher ethics, mind, and wisdom. They too will not develop their physical endurance, ethics, mind, and wisdom. They too will give dependence to others, but be unable to guide them in the higher ethics, mind, and wisdom. They too will not develop their physical endurance, ethics, mind, and wisdom. And that is how corrupt training comes from corrupt teachings, and corrupt teachings come from corrupt training. This is the second future peril that has not currently arisen, but will arise in the future …
Furthermore, in a future time there will be mendicants who have not developed their physical endurance, ethics, mind, and wisdom. In discussion about the teachings and elaborations they’ll fall into dark ideas without realizing it. And that is how corrupt training comes from corrupt teachings, and corrupt teachings come from corrupt training. This is the third future peril that has not currently arisen, but will arise in the future …
Furthermore, in a future time there will be mendicants who have not developed their physical endurance, ethics, mind, and wisdom. When discourses spoken by the Realized One—deep, profound, transcendent, dealing with emptiness—are being recited they won’t want to listen. They won’t actively listen or try to understand, nor will they think those teachings are worth learning and memorizing. But when discourses composed by poets—poetry, with fancy words and phrases, composed by outsiders or spoken by disciples—are being recited they will want to listen. They’ll actively listen and try to understand, and they’ll think those teachings are worth learning and memorizing. And that is how corrupt training comes from corrupt teachings, and corrupt teachings come from corrupt training. This is the fourth future peril that has not currently arisen, but will arise in the future …
Furthermore, in a future time there will be mendicants who have not developed their physical endurance, ethics, mind, and wisdom. The senior mendicants will be indulgent and slack, leaders in backsliding, neglecting seclusion, not rousing energy for attaining the unattained, achieving the unachieved, and realizing the unrealized. Those who come after them will follow their example. They too will become indulgent and slack, leaders in backsliding, neglecting seclusion, not rousing energy for attaining the unattained, achieving the unachieved, and realizing the unrealized. And that is how corrupt training comes from corrupt teachings, and corrupt teachings come from corrupt training. This is the fifth future peril that has not currently arisen, but will arise in the future …
These are the five future perils that have not currently arisen, but will arise in the future. You should look out for them, and try to give them up.”
“Pañcimāni, bhikkhave, anāgatabhayāni etarahi asamuppannāni āyatiṁ samuppajjissanti. Tāni vo paṭibujjhitabbāni; Variant: vo → kho (katthaci)paṭibujjhitvā ca tesaṁ pahānāya vāyamitabbaṁ.
Katamāni pañca? Bhavissanti, bhikkhave, bhikkhū anāgatamaddhānaṁ abhāvitakāyā abhāvitasīlā abhāvitacittā abhāvitapaññā. Te abhāvitakāyā samānā abhāvitasīlā abhāvitacittā abhāvitapaññā aññe upasampādessanti. Tepi na sakkhissanti vinetuṁ adhisīle adhicitte adhipaññāya. Variant: Tepi → te (bj)Tepi bhavissanti abhāvitakāyā abhāvitasīlā abhāvitacittā abhāvitapaññā. Te abhāvitakāyā samānā abhāvitasīlā abhāvitacittā abhāvitapaññā aññe upasampādessanti. Tepi na sakkhissanti vinetuṁ adhisīle adhicitte adhipaññāya. Variant: Tepi → te (?)Tepi bhavissanti abhāvitakāyā abhāvitasīlā abhāvitacittā abhāvitapaññā. Iti kho, bhikkhave, dhammasandosā vinayasandoso; vinayasandosā dhammasandoso. Idaṁ, bhikkhave, paṭhamaṁ anāgatabhayaṁ etarahi asamuppannaṁ āyatiṁ samuppajjissati. Taṁ vo paṭibujjhitabbaṁ; paṭibujjhitvā ca tassa pahānāya vāyamitabbaṁ.
Puna caparaṁ, bhikkhave, bhavissanti bhikkhū anāgatamaddhānaṁ abhāvitakāyā abhāvitasīlā abhāvitacittā abhāvitapaññā. Te abhāvitakāyā samānā abhāvitasīlā abhāvitacittā abhāvitapaññā aññesaṁ nissayaṁ dassanti. Tepi na sakkhissanti vinetuṁ adhisīle adhicitte adhipaññāya. Tepi bhavissanti abhāvitakāyā abhāvitasīlā abhāvitacittā abhāvitapaññā. Te abhāvitakāyā samānā abhāvitasīlā abhāvitacittā abhāvitapaññā aññesaṁ nissayaṁ dassanti. Tepi na sakkhissanti vinetuṁ adhisīle adhicitte adhipaññāya. Tepi bhavissanti abhāvitakāyā abhāvitasīlā abhāvitacittā abhāvitapaññā. Iti kho, bhikkhave, dhammasandosā vinayasandoso; vinayasandosā dhammasandoso. Idaṁ, bhikkhave, dutiyaṁ anāgatabhayaṁ etarahi asamuppannaṁ āyatiṁ samuppajjissati. Taṁ vo paṭibujjhitabbaṁ; paṭibujjhitvā ca tassa pahānāya vāyamitabbaṁ.
Puna caparaṁ, bhikkhave, bhavissanti bhikkhū anāgatamaddhānaṁ abhāvitakāyā abhāvitasīlā abhāvitacittā abhāvitapaññā. Te abhāvitakāyā samānā abhāvitasīlā abhāvitacittā abhāvitapaññā abhidhammakathaṁ vedallakathaṁ kathentā kaṇhadhammaṁ okkamamānā na bujjhissanti. Iti kho, bhikkhave, dhammasandosā vinayasandoso; vinayasandosā dhammasandoso. Idaṁ, bhikkhave, tatiyaṁ anāgatabhayaṁ etarahi asamuppannaṁ āyatiṁ samuppajjissati. Taṁ vo paṭibujjhitabbaṁ; paṭibujjhitvā ca tassa pahānāya vāyamitabbaṁ.
Puna caparaṁ, bhikkhave, bhavissanti bhikkhū anāgatamaddhānaṁ abhāvitakāyā abhāvitasīlā abhāvitacittā abhāvitapaññā. Te abhāvitakāyā samānā abhāvitasīlā abhāvitacittā abhāvitapaññā ye te suttantā tathāgatabhāsitā gambhīrā gambhīratthā lokuttarā suññatāppaṭisaṁyuttā, tesu bhaññamānesu na sussūsissanti, na sotaṁ odahissanti, na aññā cittaṁ upaṭṭhapessanti, na ca te dhamme uggahetabbaṁ pariyāpuṇitabbaṁ maññissanti. Variant: sussūsissanti → sussūsanti (bj, sya-all); sussusissanti (pts1ed)Ye pana te suttantā kavitā kāveyyā cittakkharā cittabyañjanā bāhirakā sāvakabhāsitā, tesu bhaññamānesu sussūsissanti, sotaṁ odahissanti, aññā cittaṁ upaṭṭhapessanti, te ca dhamme uggahetabbaṁ pariyāpuṇitabbaṁ maññissanti. Iti kho, bhikkhave, dhammasandosā vinayasandoso; vinayasandosā dhammasandoso. Idaṁ, bhikkhave, catutthaṁ anāgatabhayaṁ etarahi asamuppannaṁ āyatiṁ samuppajjissati. Taṁ vo paṭibujjhitabbaṁ; paṭibujjhitvā ca tassa pahānāya vāyamitabbaṁ.
Puna caparaṁ, bhikkhave, bhavissanti bhikkhū anāgatamaddhānaṁ abhāvitakāyā abhāvitasīlā abhāvitacittā abhāvitapaññā. Te abhāvitakāyā samānā abhāvitasīlā abhāvitacittā abhāvitapaññā therā bhikkhū bāhulikā bhavissanti sāthalikā okkamane pubbaṅgamā paviveke nikkhittadhurā, na vīriyaṁ ārabhissanti appattassa pattiyā anadhigatassa adhigamāya asacchikatassa sacchikiriyāya. Variant: bāhulikā → bāhullikā (sya-all, km)Tesaṁ pacchimā janatā diṭṭhānugatiṁ āpajjissati. Sāpi bhavissati bāhulikā sāthalikā okkamane pubbaṅgamā paviveke nikkhittadhurā, na vīriyaṁ ārabhissati appattassa pattiyā anadhigatassa adhigamāya asacchikatassa sacchikiriyāya. Iti kho, bhikkhave, dhammasandosā vinayasandoso; vinayasandosā dhammasandoso. Idaṁ, bhikkhave, pañcamaṁ anāgatabhayaṁ etarahi asamuppannaṁ āyatiṁ samuppajjissati. Taṁ vo paṭibujjhitabbaṁ; paṭibujjhitvā ca tassa pahānāya vāyamitabbaṁ.
Imāni kho, bhikkhave, pañca anāgatabhayāni etarahi asamuppannāni āyatiṁ samuppajjissanti. Tāni vo paṭibujjhitabbāni; paṭibujjhitvā ca tesaṁ pahānāya vāyamitabban”ti.
SuttaCentral