Śatapatha Brāhmaṇa ("of a hundred paths") 13.6.2.13

13.6.2.13

atha hainam vāgabhyuvāda puruṣa mā santiṣṭhipo yadi saṃsthāpayiṣyasi puruṣa eva puruṣamatsyatīti tānparyagnikṛtānevodasṛjattaddevatyā āhutīrajuhottābhistā devatā aprīṇāttā enam prītā aprīṇantsarvaiḥ kāmaiḥ

Then a voice said to him, 'Purusha, do not consummate (these human victims): if thou wert to consummate them, man (purusha) would eat man.' Accordingly, as soon as fire had been carried round them, he set them free, and offered oblations to the same divinities, and thereby gratified those divinities, and, thus gratified, they, gratified him with all objects of desire.