The Tipiṭaka in Three Languages

Jhānavibhaṅga › Suttantabhājanīya

Abhidhammapiṭaka · Vibhaṅga · Vol. 35 · Section 692

[692] "The sphere of the infinity of space (ākāsānañcāyatana)": the phenomena (dhammā) of mind (citta) and mental factors (cetasika) of one who has attained the sphere of the infinity of space, or of one who has been reborn [in it], or of one who dwells in happiness in the present life.

English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.

This passage also appears in 2 other places