Śatapatha Brāhmaṇa ("of a hundred paths") 4.2.4.16

4.2.4.16

eṣa vai prajāpatiḥ | ya eṣa yajñastāyate yasmādimāḥ prajāḥ prajātā etamvevāpyetarhyanu prajāyante sa yānupakīrṇe sādayati tasmādyāstānanu prajāḥ prajāyante tā anyenātmano 'syām pratitiṣṭhanti yā vai śaphaiḥ pratitiṣṭhanti tā anyenātmano 'syām pratitiṣṭhantyatha yadetaṃ vyuhya na tṛṇaṃ canāntardhāya sādayati tasmādyā etamanu prajāḥ prajāyante yā ātmanaivāsyām pratitiṣṭhanti manuṣyāśca śvāpadāśca

Now, that sacrifice which is being performed is Pragâpati, from whom these creatures on earth have been born,--and indeed even now they are born after this (sacrifice). The creatures that are born therefrom after those (libations) which he deposits on the raised (mound), stand on this (earth) with something different from their own self,--for those which stand on hoofs indeed stand on this (earth) with something different from their own self. And when he deposits this (Dhruva cup) after shifting aside (the dust), and not leaving so much as a blade of grass between,--the creatures that are born thereafter from this (sacrifice), stand on this (earth) with their own self, namely, men and wild beasts