Shatapatha Brahmana 11.7.1.3

11.7.1.3

sa yatpaśubandhena yajate ātmānamevaitanniṣkrīṇīte vīreṇa vīraṃ vīro hi paśurvīro yajamāna etadu ha vai paramannādyaṃ yanmāṃsaṃ sa paramasyaivānnādyasyāttā bhavati taṃ vai saṃvatsaro nānījanamatīyādāyurvai saṃvatsara āyurevaitadamṛtamātmandhatte

Now, when he performs the animal offering. he thereby redeems himself--male by male, for the victim is a male, and the Sacrificer is a male. And this, indeed, to wit, flesh, is the best kind of food: he thus becomes an eater of the best kind of food. Let not a year pass by for him without his offering; for the year means life: it is thus immortal life he thereby confers upon himself.