There are several Sila Suttas. I am not sure which sutta that refers to.
However, the “antarāparinibbāyī” state is described in the following sutta: “Paṭhamavitthāra Sutta (SN 48.15).”
“Imesaṁ kho, bhikkhave, pañcannaṁ indriyānaṁ samattā paripūrattā arahaṁ hoti, tato mudutarehi antarāparinibbāyī hoti, tato mudutarehi upahaccaparinibbāyī hoti, tato mudutarehi asaṅkhāraparinibbāyī hoti, tato mudutarehi sasaṅkhāraparinibbāyī hoti, tato mudutarehi uddhaṁsoto hoti akaniṭṭhagāmī, tato mudutarehi sakadāgāmī hoti, tato mudutarehi sotāpanno hoti, tato mudutarehi dhammānusārī hoti, tato mudutarehi saddhānusārī hotī”ti.”
Here, the ten samyojana are eliminated as follows:
- dhammānusārī and saddhānusārī are Sotapanna Anugamis. They have only started on eliminating the lowest three samyojana.
- sotāpanno has eliminated the lowest three samyojana.
- sakadāgāmī has started to eliminate the next two (kama raga, patigha).
- upahaccaparinibbāyī , asaṅkhāraparinibbāyī , sasaṅkhāraparinibbāyī, anduddhaṁsoto hoti akaniṭṭhagāmī are Anagamis who have eliminated the lower five samyojana and are in various stages of eliminating the higher five (rupa raga, arupa raga, mana, uddhacca, avijja.) They are born in various realms reserved for Anagamis.
- antarāparinibbāyī is a human Anagami who has died after eliminating rupa raga and arupa raga but has not eliminated mana, uddhacca, or avijja. Thus, he cannot be reborn in any realm because all three of kama, rupa, and arupa raga have been eliminated. But the existing manomaya kaya cannot perish since there are three more samyojana left. Thus, he stays with the manomaya kaya until the kammic energy left in the human bhava is worn out.
- P.S. Of course, arahaṁ refers to an Arahant who has eliminated all samyojana.
