Śatapatha Brāhmaṇa ("of a hundred paths") 3.9.4.13

3.9.4.13

tadvai devā aspṛṇvata | te 'syaitenaivaitāstanūrāpnuvantsa kṛtsna eva devānāṃ havirabhavattatho evāsyaiṣa etenaivaitāstanūrāpnoti sa kṛtsna eva devānāṃ havirbhavati tasmādevamabhimṛśati

The gods then were victorious. They obtained those bodies by means of this same (formula), and he became entirely the sacrificial food of the gods. And in like manner does this (priest) now thereby obtain those bodies of his, and he (Soma) becomes entirely the food of the gods: this is why he thus touches it.