YV 2.5l

Three boons should he give, the breaths are three; (verily they serve) to guard the breaths; two only should be given, for the breaths are two; one only should be given, for the breath is one. The fire is an animal here [2]; animals do not find pleasure in want of grass; a brick of Durva grass he puts down, to support animals; with two (verses), for support. 'Arising from every stem', he says, for it finds support with every stem; 'do thou, O Durva, extend us with a thousand, a hundred', he says; Prajapati is connected with a thousand; (verily it serves) to obtain Prajapati. The fact that it has three lines on it is a mark of the gods; the gods put it down with the mark uppermost, the Asuras with the mark undermost [3]; if he desire of a man, 'May he become richer', he should put it down for him mark uppermost; verily he becomes richer; if he desire of a man, 'May he become worse off', he should put his down mark undermost; verily he makes him depressed in accordance with its birthplace among the Asuras, and he becomes worse off. (The brick) has three lines on it; that with three lines is these worlds; verily he excludes its foe from these worlds. When the Angirases went to the world of heaven, the sacrificial cake becoming a tortoise crawled after them [4]; in that he puts down a tortoise, just as one who knows a place leads straight (to it), so the tortoise leads him straight to the world of heaven. The tortoise is the intelligence of animals; in that he puts down the tortoise, animals resort there, seeing their own intelligence; in that the heads of the dead animals are deposited, a burial-ground is made; in that he puts down the living tortoise, he is no maker of a burial-ground, the tortoise is suitable for a dwelling [5].