Shatapatha Brahmana 1.4.3.11

1.4.3.11

sa yadyenam prathamāyāṃ sāmidhenyāmanuvyāharet | tam prati brūyātprāṇaṃ vā etadātmano 'gnāvādhāḥ prāṇenātmana ārttimāriṣyasīti tathā haiva syāt

And if any one were to curse this one (the Hotri) at the (recitation of the) first kindling verse, then he (the Hotri) should say to him, 'Thereby thou hast put thine own out-breathing into the fire: by that out-breathing of thine shalt thou undergo suffering!' for this is what would take place.