Suttas that detail the four attainments

[Matt]

You’re welcome. Āyatana is usually translated as sphere or base, @Gabriel has made a few threads that may be relevant:

Ayatana vs Indriya - synonyms?

Is there a clear sutta-based difference between āyatana and indriya? Both don’t really mean sense-organs but are broader in scope āyatana has very vague translations - base, stretch, sphere. It appears in the dependent origination, but also in the arupas, e.g. ‘base of nothingness’ indriya translated as ‘faculty’ is equally vague. We have it in ‘sense restraint’, but also the ‘spiritual faculties’ (i.e. faith, energy, sati, samadhi, pañña) If they are synonyms, could we say ‘ayatana-restra…

'āyatana' in context

Like some other terms essential for the understanding of the EBT āyatana has not received its due attention, often translated as the inaccessible ‘base’ I would like to highlight in which conceptual contexts it appears. āyatana in Vedic/Sanskrit sources Monier-Williams translates āyatana as a resting-place, support, seat, place, home, house, abode, a sanctuary, a barn Jan Gonda provides an exhaustive source collection of āyatana in Indian sources (Gonda (1975): Selected Studies, Volume II…

On the other hand, what is usually translated as ‘attainment’ is the Pāḷi word, samāpatti.

That’s about as far as I can go, you’d have to ask someone more knowledgeable what the differences are.