Brihadaranyaka Upanishad 6.4.24

6.4.24

jāte'gnimupasamādhāyāṅka ādhāya kam̐se pṛṣadājyam̐saṃnīya pṛṣadājyasyopaghātaṃ juhotyasminsahasraṃ puṣyāsamedhamānaḥ sve gṛhe | asyopasaṃdyāṃ mā cchaitsītprajayā ca paśubhiśca svāhā | mayi prāṇām̐stvayimanasā juhomi svāhā yatkarmaṇātyarīricaṃ yadvā nyūnamihākaram | agniṣṭatsviṣṭakṛdvidvānsviṣṭam̐ suhutaṃ karotu naḥ svāheti

When (the son) is born, he should bring in the fire, take him in his lap, put a mixture of curds and clarified butter in a cup, and offer oblations again and again with that, saying, 'Growing in this home of mine (as the son), may I maintain a thousand people! May (the goddess of fortune) never depart with children and animals from his line! Swâhâ. The vital force that is in me, I mentally transfer to you. Swâhâ. If I have done anything too much or too little in this ceremony, may the all-knowing beneficent fire make it just right for me—neither too much nor too little! Swâhâ.'