Jaiminīya (Talavakāra) Brāhmaṇa 25.154

These are Gāyatrī verses.
Just as one would cross from the level to the level, such is that.
The other meters are now exhausted of strength; the Gāyatrī alone is not exhausted of strength.
Through exhausted chants, through exhausted recitations, the vaṣaṭ-call becomes exhausted.
Five days have seasons; the sixth is seasonless.
In that the Hotṛ priests make the vaṣaṭ-call separately for the seasonal offerings, by that very fact the sixth day is endowed with a season.
Upon them is the Vāravantīya.
This is indeed rich in wealth (raivatya), that the Vāravantīya is on the Revatī verses.
He becomes wealthy, a wealthy person of wealth is born to him, who, knowing this, praises with the Vāravantīya on the Revatī verses.
This is the great Raivatya, that the Vāravantīya is on the Revatī verses.
The sixth day is connected with the Bṛhatī.
By that very fact, the sixth day is made connected with the Bṛhatī.
This Pṛṣṭhya six-day rite is Agni Vaiśvānara.
The pṛṣṭhas are the seasons.
The seasons are the year.
The year is Agni Vaiśvānara.
If unappeased, he is capable of burning up.
In that the Vāravantīya becomes the pṛṣṭha, it is for the appeasement of Agni Vaiśvānara, not for burning.

Prajāpati created this sacrifice, namely the Pṛṣṭhya six-day rite.

Once created, it ran away.

He wished to ward it off with the Rathantara.

He did not ward it off.

He did not ward it off with the Bṛhat.

He did not ward it off with the Vairūpa.

He did not ward it off with the Vairāja.

He did not ward it off with the Mahānāmnī verses.

He did not ward it off with the Revatī verses.

He warded it off with the Vāravantīya alone.

Because he warded it off (avārayata), that is the warding nature (vāravantīyatva) of the Vāravantīya.

When the Vāravantīya becomes the pṛṣṭha, it is for warding off the sacrifice.

Prajāpati created this sacrifice, namely the Pṛṣṭhya six-day rite.