Śatapatha Brāhmaṇa ("of a hundred paths") 8.7.1.4

8.7.1.4

te 'bruvan | na vā itthaṃ santaḥ śakṣyāmaḥ prajanayituṃ rūpaiḥ samāyāmeti ta ekaikamṛtuṃ rūpaiḥ samāyaṃstasmādekaikasminnṛtau sarveṣāmṛtūnāṃ rūpaṃ tā yannānāprabhṛtayo nānā hyasṛjyantātha yatsamānodarkā rūpairhi samāyan

They spake, 'While being thus, we shall not be able to procreate: let us unite with our forms!' They united in each single season with their forms, whence there is in each single season the form of all the seasons. As to their (formulas) beginning in a different way, it is because they were created different (or separately); and as to their ending in the same way, it is because they united with their forms.