Śatapatha Brāhmaṇa ("of a hundred paths") 1.6.4.17

1.6.4.17

tadvā etāṃ rātrim | devebhyo 'nnādyam pracyavate tadimaṃ lokamāgacati te devā akāmayanta kathaṃ nu na idam punarāgacetkathaṃ na idam parāgeva na praṇaśyediti tadya eva saṃnayanti teṣvāśaṃsanta eta eva naḥ saṃbhṛtya pradāsyantītyā ha vā asmintsva!śca niṣṭyāśca śaṃsante ya evametadveda yo vai paramatāṃ gacati tasminnāśaṃsante

Thus during that night (of new moon) food moves away from the gods and comes to this world. Now the gods were desirous as to how that (food) might (be made to) come back to them; how it might not perish away from them. For this they put their trust in those who prepare the libation of sweet and sour milk (sânnâyya), thinking, 'when they have prepared it, they will offer it to us.' And, verily, in him, who knows this, both his own kin and strangers put their trust; for in him, who attains to the highest rank, people indeed put their trust.