Brihadaranyaka Upanishad 6.4.12

6.4.12

atha yasya jāyāyai jāraḥ syāttaṃ ceddviṣyādāmapātre'gnimupasamādhāya pratilomam̐ śarabarhistīrtvā tasminnetāḥ śarabhṛṣṭīḥ pratilomāḥ sarpiṣāktā juhuyānmamasamiddhe'hauṣīḥ prāṇāpānau ta ādade'sāviti mama samiddhe'hauṣīḥ putrapaśūm̐sta ādade'sāviti mama samiddhe'hauṣīriṣṭāsukṛte ta ādade'sāviti mama samiddhe'hauṣīrāśāparākāśau ta ādade'sāviti sa vā eṣa nirindriyo visukṛto'smāllokātpraiti yamevaṃvidbrāhmaṇāḥ śapati tasmādevaṃvicchrotriyasya dāreṇa nopahāsamiccheduta hyevaṃvitparo bhavati

If a man's wife has a lover whom he wishes to injure, he should put the fire in an unbaked earthen vessel, spread stalks of reed and Kusha grass in an inverse way, and offer the reed tips, soaked in clarified butter, in the fire in an inverse way, saying, 'Thou hast sacrificed in my kindled fire, I take away thy Prâna and Apâna—such and such. Thou hast sacrificed in my kindled fire, I take away thy sons and animals—such and such. Thou hast sacrificed in my kindled fire, I take away thy Vedic rites and those done according to the Smriti—such and such. Thou hast sacrificed in my kindled fire, I take away thy hopes and expectations—such and such.' The man whom a Brâhmaṇa with knowledge of this ceremony curses, departs from this world emasculated and shorn of his merits. Therefore one should not wish even to cut jokes with the wife of a Vedic scholar who knows this ceremony, for he who has such knowledge becomes an enemy.