Padasodhanavāra

Abhidhammapiṭaka · Yamaka (1) · Vol. 38 · Section 56

[56] Are formations (saṅkhārā) the aggregate of volitional formations (saṅkhārakkhandha)? Setting aside the aggregate of volitional formations, the remaining formations are formations but not the aggregate of volitional formations; the aggregate of volitional formations is both formations and the aggregate of volitional formations. Are aggregates (khandhā) the aggregate of perception (saññākkhandha)? The aggregate of perception is both an aggregate and the aggregate of perception; the remaining aggregates are aggregates but not the aggregate of perception.

English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.

This passage also appears in 5 other places