Śatapatha Brāhmaṇa ("of a hundred paths") 4.4.1.13

4.4.1.13

taṃ vā apurorukkaṃ gṛhṇāti | viśvebhyo hyenaṃ devebhyo gṛhṇāti sarvaṃ vai viśve devā yadṛco yadyajūṃṣi yatsāmāni sa yadevainaṃ viśvebhyo devebhyo gṛhṇāti teno hāsyaiṣa puroruṅmānbhavati tasmādapurorukkaṃ gṛhṇāti

He draws it without a puroruk, for he draws it for the All-gods, and the All-gods are everything, the Rik and Yagus and Sâman; and even in that he draws it for the All-gods, thereby it becomes supplied with a puroruk for him: therefore he draws it without a puroruk.