Śatapatha Brāhmaṇa ("of a hundred paths") 1.4.3.15

1.4.3.15

yadi pañcamyāmanuvyāharet | tam prati brūyādvācaṃ vā etadātmano 'gnāvādhā vācātmana ārttimāriṣyasi mūko bhavi ... syāt

If any one were to curse him at the fifth (verse), he should say to him, 'Thereby thou hast put thine own voice into the fire: by that voice of thine shalt thou undergo suffering, thou shalt become dumb!' for this is what would take place.