Śatapatha Brāhmaṇa ("of a hundred paths") 4.3.1.13

4.3.1.13

tau vā ṛtuneti ṣaṭ pracarya | itarathā pātre viparyasyete ṛtubhiriti catuścaritvetarathā pātre viparyasyete anyatarata eva taddevā aharasṛjantānyatarato rātrimanyatarata eva taddevā manuṣyānasṛjantānyatarataḥ paśūn

And having performed six times with, 'With the season,' they both turn round their vessels to the other side; and having performed four times with, 'With the seasons,' they turn round their vessels to the other side: from the one side (or mouth) indeed the gods created the day, and from the other side the night; from the one side the gods created men, and from the other beasts.