Śatapatha Brāhmaṇa ("of a hundred paths") 1.4.3.14

1.4.3.14

yadi caturthyāmanuvyāharet | tam pratibrūyācrotraṃ vā etadātmano 'gnāvādhāḥ śrotreṇātmana ārttimāriṣyasi badhiro bhaviṣyasīti tathā haiva syāt

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