Śatapatha Brāhmaṇa ("of a hundred paths") 1.6.4.14

1.6.4.14

taddhaike | dṛṣṭvopavasanti śvo nodetetyado haiva devānāmavikṣīṇamannam bhavatyathaibhyo vayamita upapradāsyāma iti taddhi samṛddhaṃ yadakṣīṇa eva pūrvasminnanne 'thāparamannamāgacati sa ha bahvanna eva bhavatyasomayājī tu kṣīrayājyado haiva somo rājā bhavati

Here now some people enter upon the fast when they (still) see (the moon, on the fourteenth day of the half-month), thinking, 'To-morrow he will not rise: already, then, there is unfailing food for the gods in yonder heaven, and to this we will offer them more from hence (to-morrow)!'--He, indeed, is in a prosperous state with whom, while the old food is still unfailing, fresh food is accruing; for such a one has indeed abundant food. However, he is not now offering Soma, but he is offering milk (i.e. the Sânnâyya), and that (milk) becomes king Soma (in yonder world):