Vepacittisutta

Suttapiṭaka · Saṁyuttanikāya · Sagāthāvaggasaṁyutta · Vol. 15 · Section 875

[875] Let him think it, if he will, or not: "This one endures me out of fear"— among goods one's own good is supreme, and nothing better than patience (khanti) is found. Truly, when one who is strong endures the weak, that they call the supreme patience; the weak must ever endure. They call that strength no strength at all whose strength is a fool's strength; but for the strong one guarded by the Dhamma no one is found to gainsay him. It is only the worse for him who returns anger upon one who is angry; not returning anger upon the angry one, one wins a battle hard to win. He conducts himself for the good of both— his own and the other's— who, knowing the other to be enraged, mindfully (sato) grows calm. Of him who works the healing of both— of himself and of the other— people think, "He is a fool": those who are unskilled in the Dhamma.

English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.