The Tipiṭaka in Three Languages

Suññatavāra

Abhidhammapiṭaka · Dhammasaṅgaṇī · Vol. 34 · Section 407

[407] What at that time is equanimity (upekkhā)? That which at that time is mental, neither agreeable nor disagreeable; the felt experience, neither painful nor pleasant, born of mind-contact; the feeling (vedanā), neither painful nor pleasant, born of mind-contact — this at that time is equanimity.

English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.

This passage also appears in 5 other places