Appamaññāvibhaṅgasuttantabhājanīya

Abhidhammapiṭaka · Vibhaṅga · Vol. 35 · Section 744

[744] And how does a bhikkhu dwell pervading one direction with a mind accompanied by compassion (karuṇā)? Just as one would feel compassion on seeing one person in distress and in a wretched plight, even so he pervades all beings with compassion.

English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.