Verse 421: Him I call a brahmana, who does not cling to the past, future and present khandha aggregates and who is free from moral defilements and attachment.
Verse 421 contradict Sarvastivada.
Sarvastivada claims all dharma in the past, present and future exist (all dharmas exist in all three times.) This is eternalism.I had a conversation with Google Gemini about that: Sarvastivada, Time, and Eternalism - Google Gemini