Bhagavatapurana 10.64.42

10.64.42

yathāhaṃ praṇame viprān anukālaṃ samāhitaḥ /
tathā namata yūyaṃ ca yo 'nyathā me sa daṇḍa-bhāk //

41. & 42. "O my kinsmen, do no wrong at all even to the brahmin that does an offence, kill or reproach he may: always worship him; just as I every hour, with perfect control over My mind, bow to him, so do you. And whosoever may violate this, shall be the recipient of My punishment.