Jaiminīya (Talavakāra) Brāhmaṇa 2-2.6

Recognizing this world as his dwelling, he pierced through it with the strings. They placed the Svarasāman days below him. He looked forth upon that further world; he pierced through it too with strings. They placed the Svarasāman days beyond him. They rescued him there; because they rescued (aspṛṇvan) him, that is the essence of the Svarasāman days (svaratva). The Svarasāmans are seventeen-fold. Food is indeed seventeenth. They placed him upon food then. Moreover, Prajāpati is seventeen-fold. Through Prajāpati they placed him upon food then. He burns, established upon the primordial food. These Svarasāmans amount to fifty-one Virājes of thirty-six syllables each: twenty-five below, twenty-five beyond. Now, having arranged himself in the middle of the fifty-first, he burns, placed upon it. There is neither heat nor cold, he hungers not, he thirsts not, and there is no return for him. He who knows thus does not hunger, does not thirst, and for him there is no return.

Just as a jar of clarified butter or a jar of honey would be carried, hanging in a net,

so is he held on all sides by these Virājes.

proceeding forward and backward, held by these.

Now, some make these Svarasāman days into Agniṣṭomas, saying, 'We are making this a bṛhatī of chants.'

So saying [they do so].

Those three Agniṣṭomas are thirty-six chants.

Twelve of one, twelve of one, twelve of one: that is thirty-six.

The bṛhatī indeed consists of thirty-six syllables.

The bṛhatī is the heavenly world.

It touches this [world].

[They say:] 'By the bṛhatī let us go to that heavenly world.'