Jaiminīya (Talavakāra) Brāhmaṇa 23.135

for this day is sap. That sap which flowed beyond the fifth day became this day. It is this very sap. 'Roaring, the prize-winner rushes toward the vat'—they thus release the bull into the Revatī verses at the morning pressing for generation. 'Lord of heaven, thousand-streamed, far-seeing'—that which has 'hundred' or 'thousand' is the characteristic form of the Jagatī; this day belongs to the Jagatī. 'The tawny one sits in the seats of Mitra, purified with sheep-fleeces, with rivers, as a bull'—there are verses containing 'bull', which is the characteristic form of the Bṛhat; this day belongs to the Bṛhat. 'At the front of the rivers thou rushest, being clarified; foremost of speech, thou goest leading among the cattle. At the front of the prize thou dost partake of great wealth; having fine weapons, thou art pressed by the pressers, O Soma'—it contains 'front' and 'foremost'. For this day is foremost, which belongs to the Bṛhat. Foremost is the thirty-three-fold of stomas. That [day] the Revatī verses follow accordingly.

These verses are Jagatīs, possessing the color of the Jagatī, made prosperous by the characteristic form of the day.

Wherever they make prosperous with the characteristic form of the day, there prosperity is attained.

He attains prosperity who knows thus.

'The prize-winners have rushed forth'—

it is the corresponding verse, referring to what has already occurred.

These verses thereby repeat after the six-day period that has been released.

Regarding this they say: 'They begin the characteristic form of the day with the stotriya verse, and that of the sāman with the corresponding verse.'