Mettāsahagatasutta

Suttapiṭaka · Saṁyuttanikāya · Mahāvaggasaṁyutta · Vol. 19 · Section 580

[580] Dwell pervading one quarter with a mind (citta) imbued with equanimity (upekkhā), likewise the second, likewise the third, likewise the fourth. Thus above, below, across, everywhere, and to all as to oneself, dwell pervading the entire world with a mind imbued with equanimity—abundant, exalted, immeasurable, without enmity, without ill will.

English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.

This passage also appears in 1 other place

Vol. 19 · Section 593 — Mettāsahagatasutta