Jaiminīya (Talavakāra) Brāhmaṇa 2-7.228

They became fish. He created a third [generation of] creatures. They also perished from him. They became birds. He reflected: 'These three kinds of creatures which I created, being without brahman, without food, without sacrifice, have perished. Come now, let me create creatures from brahman, from food, from sacrifice.' He placed food within himself. He rumbled over it; it sprang forward. They became the two breasts. Because he rumbled (astanayat) over it, that is the breast-nature (stanatva) of the breasts (stana). It overflowed (atyakṣarat); it became milk (kṣīra). Because it overflowed, that is the milk-nature (kṣīratva) of milk. He indeed then placed rice and barley within himself; this is the milk of rice and barley. He reflected: 'Truly, I am capable of [providing for] him whom I might create; he would obtain food, whatever I might create. Come, let me create!'

He saw these four-month seasonal sacrifices.

He brought them.

He sacrificed with them.

Through them he created these creatures.

These that have breasts—to them he gave food.

They became his creatures possessed of food.

He who should desire: 'May I be multiplied with offspring and cattle, may these creatures of mine be possessed of food!'—

he should sacrifice with these [rites].

He is indeed multiplied with offspring and cattle; his creatures become possessed of food.

Concerning this, this [verse] is recited:

"Three creatures passed away;

others entered into the fire all around;

the great one stood within the measure of space."