Gargya said: 'The person that is in the moon (and in the mind), that I adore as Brahman.' Agatasatru said to him: 'No, no! Do not speak to me on this. I adore him verily as the great, clad in white raiment, as Soma, the king.' Whoso adores him thus, Soma is poured out and poured forth for him day by day, and his food does not fail.

In plain words: Gargya said he worships the person in the moon as Brahman. The king said he already honors that one as great, dressed in white, as Soma the king, and whoever does so never runs out of food.