YV 5.6e

He drew this libation for Mahendra, having slain Vrtra and being above the other deities; in that (the cup) for Mahendra is drawn, so the sacrificer draws this libation, being above other people. He draws with the Çukra vessel; (the cup) for Mahendra has the sacrificer as its deity, the Çukra is brilliance; in that he draws (the cup) for Mahendra in the Çukra-vessel, verily he bestows brilliance on the sacrificer. Aditi, desirous of offspring, cooked a Brahman's mess for the Sadhya gods; to her the gave the remains, she ate it, she became pregnant; of her the four Adityas were born. A second (mess) she cooked; she reflected, 'They have been born for me from the remains; if I eat first, then stronger ones will be born from me'; she ate first, she became pregnant, from her was born an egg which miscarried. She cooked a third (mess) for the Adityas [1], (saying) 'Let this labour be for enjoyment to me'; they said, 'Let us choose a boon; let him who shall be born hence be one of us; let him who shall be prosperous among his offspring be for our enjoyment'; then was born the Aditya Vivasvant, men are his offspring here, among them he alone is successful who sacrifices, he serves for enjoyment of the gods. The gods kept Rudra away from the sacrifice [2], he followed the Adityas; they took refuge in (the cups) for two deities, them they did not give up; therefore men do not give up even one worthy of death who has come for help. Therefore (the cup) for the Adityas is drawn from those for two deities, in that they were born from the remnant, therefore it is drawn from the remnant. He draws with three verses; mother, father, son, verily that is this pairing; the amnion, embryo, the chorion, verily that is this [3] pairing. The Aditya (cup) is cattle; curds are strength; he mixes with curds in the middle; verily he places strength in the middle of cattle; (with curds) to be coagulated with boiled milk, for purity. Therefore the raw milks the cooked.