YV 1.5l

If he were not to offer the animals, then he would not obtain animals [2]; if he were to let them go after circumambulation with fire, he would disturb the sacrifice; if he were to keep them until the conclusion, the heads would be exhausted; in that he offers the animals, he wins thereby animals; in that he lets them go after circumambulation with fire, (it serves) to prevent the exhaustion of the heads; he concludes (the rite) with (an animal) for Prajapati; Prajapati is the sacrifice; verily he concludes the sacrifice in the sacrifice. Prajapati created offspring, he thought himself empty, he saw these April (verses), with them from the head [3] he satisfied himself. In that there are these April verses, and Prajapati is the sacrifice, he satisfies the sacrifice from the beginning with them. They are of unlimited metres; Prajapati is unlimited; (verily they serve) to obtain Prajapati. The pairs are deficient and redundant, for propagation; hairy by name is that metre of Prajapati, animals are hairy; verily he wins animals. There are all forms in these; all forms are made when Agni has to be piled up, therefore these appertain to Agni, to be piled [4]. Twenty-one kindling-(verses) be repeats; the twenty-onefold (Stoma) is light; verily he attains light, and a support besides, for the twenty-one fold (Stoma) is support. Twenty-four (verses) he recites; the year has twenty-four half-months, Agni Vaiçvanara is the year; verily straightway he wins Vaiçvanara. He recites them straight on, for the world of heaven is as it were going straight away. 'Let the half-years, the seasons, increase thee, O Agni ', he says; verily with the half-years he causes Agni to increase [5], with the seasons the year. 'Illuminate all the quarters of the earth', he says; therefore Agni illuminates all the quarters. 'The Açvins removed death from him', he says; verily from him he repels death.