The Buddha

"If anyone were to give you a blow with the hand, or hit you with a clod of earth, or with a stick, or with a sword, even then you should abandon those urges and thoughts which are worldly. There, Phagguna, you should train yourself thus: 'Neither shall my mind be affected by this, nor shall I give vent to evil words;... but I shall remain full of concern and pity, with a mind of love, and I shall not give in to hatred.' This is how you should train yourself. [MN 21, Acharya Buddharakkhita translated]