Jaiminīya (Talavakāra) Brāhmaṇa 1.172

To him, who had conquered and was seated as lord of tens, they brought out special portions saying, 'To the lord of tens! To the lord of tens!'
That is the essence of the Dāśaspatya's name.
He who knows thus receives a special portion; he becomes worthy of a special portion.
One who desires food should use the Viśoviśīya.
Agni desired: 'May I be the food-eating, supreme overlord of clan after clan!'
He saw this sāman.
With it he praised.
Then indeed he became the food-eating, supreme overlord of clan after clan.
Then clan after clan traded through him.
Since clan after clan trade through him, that is the essence of the Viśoviśīya's name.
He is indeed the food-eating, supreme overlord of clan after clan.
He who knows thus becomes the food-eating, supreme overlord of clan after clan.
One who desires cattle should use the Vāravantīya.
Prajāpati created cattle.
Having been created, they departed from him.
He checked them with the Vāravantīya alone.
Because he checked [them], that is the essence of the Vāravantīya's name.
Therefore, the Vāravantīya is an Agniṣṭoma-sāman for the securing of cattle, for the non-departure of cattle.

He who knows the udder of the sacrifice milks out the yielded sacrifice.

The Yajñāyajñīya is indeed the udder of the sacrifice.

Its teats are the Gāyatra, the Rathantara, the Bṛhat, and the Vāmadevya.

He should make the prelude like the Gāyatra.

He should utter musical chants like those of the Rathantara.

He should ascend the ascents like those of the Bṛhat.

The syllable 'him' is the Vāmadevya, and the Yajñāyajñīya itself is [the udder].