Śatapatha Brāhmaṇa ("of a hundred paths") 1.2.1.18

1.2.1.18

atha haviradhivapati | dhānyamasi dhinuhi devāniti dhānyaṃ hi devāndhinavadityu hi havirgṛhyate

He now pours the rice on (the lower stone), with the text (Vâg. S. I, 20): 'Grain (dhânyam) art thou! do thou gratify (dhi) the gods!' for it is grain; and it is with the intention 'that it may gratify the gods' that the rice-oblation is taken.