Shatapatha Brahmana 4.3.1.25

4.3.1.25

atha vaiśvadevaṃ grahaṃ gṛhṇāti | sarvaṃ vā idam prājījanadya ṛtugrahānagrahītsa yaddhaitāvadevābhaviṣyadyāvatyā haivāgre prajāḥ sṛṣṭāstāvatyo haivābhaviṣyanna prājaniṣyanta

Thereupon he draws the Vaisvadeva cup. For by drawing the Ritugrahas he has generated this All; but were there nothing but that, there would indeed be only as many, creatures as were created in the beginning: no (more) would be generated.