SN 7.2 Akkosa Sutta: Abuse
"Once the Blessed One was staying at Rajagaha in the Bamboo Grove near the Squirrels' Feeding Place. Now the brahman Akkosa Bharadvaja heard this: "The brahman Bharadvaja, it seems, has become a monk under the Great Monk Gotama." Angry and unhappy, he went to where the Blessed One was. Having approached the Blessed One, he abused and criticized the Blessed One in foul and harsh words. Thus reviled, the Blessed One spoke to the brahman Akkosa Bharadvaja: 'Well, brahman, do friends, colleagues, relatives, and kinsmen and guests visit you?"
"Yes, Gotama, sometimes friends, colleagues, relatives, kinsmen and guests do visit me."
"Well, brahman, do you not offer them snacks or food or meals?"
"Yes, Gotama, sometimes I do offer them snacks or food or meals."
"But if, brahman, they do not accept your offer, who gets them?"
"If Gotama, they do not accept them, they are still mine."
"In the same way, brahman, you are abusing us who do not abuse, you are angry with us who do not get angry, you are quarreling with us who do not quarrel. All these of yours we don't accept. They are still yours, brahman. They are still yours."
"When, brahman, one abuses back when abused, repays anger in kind, and quarrels back when quarreled with, he is said, brahman, to partake the meal and enter upon an exchange. But we do not partake your meal. We do not enter upon an exchange. Therefore, they still belong to you, brahman; they still belong to you."
"The king and his retinue know this of Master Gotama: 'The Monk Gotama is an arahant' — and yet still Master Gotama gets angry."
Said the Buddha:
"Where is anger for one freed from anger,
Who is subdued and lives perfectly equanimous,
Who truly knowing is wholly freed,
Supremely tranquil and equipoised?
He who repays an angry man with anger,
makes things worse;
Who does not repay anger in kind,
he alone wins the battle hard to win [Walshe: "Celebrates a double victory."]
He practices for the welfare of both,
his own, as well as of the other.
Knowing that the other man is angry,
he mindfully maintains his peace.
When he works the cure of both,
his own and the other's,
The people consider him a fool,
are unskilled in the Dhamma."
"And the brahman Akkosa Bharadvaja received at the hands of the Blessed One the initial monastic ordination and he also received the higher ordination of a bhikkhu...
The Venerable Akkosa Bharadvaja, indeed, became one of the Arahats."
[The "translation" is synthesized from various available translations.]