Jaiminīya (Talavakāra) Brāhmaṇa 15.67

He who knows thus attains the heavenly world. Its nidhana is that very fire which they churn in the stotra of the Vairāja. “I delight in you, Soma” — “in you” is the form of the bṛhat; this day belongs to the bṛhat. “In friendship, Indu, day by day, many things move down upon me, tawny one; pass beyond the enclosing sticks” — for they went beyond. “Milking by night and by day for you, tawny one, on the udder, Soma” — these two [worlds] indeed are the two udders; these two he addresses thus, and these two milk all desires for him. “Going beyond the sun that burns with heat” — thus they contain the sun; for this twenty-one-fold day is solar, a firm foundation, Vairāja. “Like birds [they fly] towards it” — for they flew beyond. Over these [verses] is the Āṣṭādaṃṣṭra whose brāhmaṇa has been spoken. It has an upward iḷā, the form of the bṛhat on the day of the bṛhat. Thereby it is endowed with its proper form.

Now the Ābhīśava [sāmans]: [they are] a seizing of the sacrifice, a turning back; he takes hold, as it were, of the fifth day, and he runs back towards

the third.

By means of the twelve-day rite, the gods went upwards to the heavenly world.

Ungrasped, it fell apart for them.

They saw these two sāmans.

With these two, just as one might mount a chariot having seized it with the reins, even so, having grasped [the sacrifice] with these two, they mounted unto the heavenly

world.