Shatapatha Brahmana 11.1.1.6

11.1.1.6

sarveṣu ha vā asya deveṣu sarveṣu bhūteṣu sarvāsu devatāsu sarveṣvṛtuṣu sarveṣu stomeṣu sarveṣu pṛṣṭheṣu sarveṣu candaḥsvagnī āhitau bhavato yo'māvāsyāyāmādhatte tasmādamāvāsyāyāmevāgnī ādadhīta

And, verily, it is for all the gods, for all spirits, for all deities, for all seasons, for all Stomas, for all Prishthas, and for all metres that the fires of him are laid down who lays them down at new moon: he should therefore lay them down at new moon.