YV 7.6a

The Piling of the Fire Altar (continued) a 'He who piles the fire without regard to the deity falls a victim to the deities; he becomes poorer; he who (piles it) according to the deity does not fall a victim to the deities; he becomes richer. With a Gayatri (verse) addressed to Agni should he stroke the first layer; with a Tristubh the second; with a Jagati the third; with an Anustubh the fourth; with a Pankti the fifth; verily he piles the fire according to the deity. He falls not a victim to the deities; he becomes richer. This is the dividing of the sacrificial food; the food is cattle, and he piles it with cattle [1]. b He who piles the fire after announcing to Prajapati does not go to ruin. The horses should stand on either side, on the left the black, on the right the white; having offered them he should put down the bricks; that is the form of Prajapati, the horse is connected with Prajapati; verily having announced to Prajapati in real presence he piles the fire, he does not go to ruin; the white horse is the form of day, the black of night; the bricks are the form of day [2], the mortar of night; when about to put down the bricks he should stroke the white horse, when about to put down the mortar he should stroke the black; verily with the days and nights he piles it. c A golden vessel full of honey he gives, (saying), 'May I be possessed of honey'; with (a verse) addressed to Surya, containing the word 'brilliant', he should gaze (on it); verily it becomes brilliant in the midday; he causes the horse to sniff it; Indra is yonder sun, Prajapati is he; the horse is connected with Prajapati; verily he wins him straightway. a To thee, O Agni, the bull, the wise, I have come, generating thee ever new; Be our household rites not halting; With thy keen holy power sharpen us. The bricks are cattle, in each layer he puts down a bull (brick); verily in his sacrifice he makes a pairing for propagation; therefore in every herd there is a bull.