Śatapatha Brāhmaṇa ("of a hundred paths") 13.2.8.2

13.2.8.2

ghnanti vā etatpaśum yadenaṃ saṃjñapayanti prāṇāya svāhāpānāya svāhā vyānāya svāheti saṃjñapyamāna āhutīrjuhoti prāṇānevāsminnetaddadhāti tatho hāsyaitena jīvataiva paśuneṣṭaṃ bhavati

When they quiet a victim they kill it. Whilst it is being quieted, he (the Adhvaryu) offers (three) oblations, with (Vâg. S. XXIII, 18), 'To the breath hail! to the off-breathing hail! to the through-breathing hail!' he thereby lays the vital airs into it, and thus offering is made by him with this victim as a living one.