YV 5.2g

Their deity is Mahendra. He who sacrifices beyond his own deity loses his own deity, and does not obtain another, and becomes worse. For a year one should sacrifice to Indra, for the vow extends not beyond the year; verily [4] his own deity, being sacrificed to, kindles him with prosperity and he becomes richer. After the year he should offer a cake on eight potsherds to Agni, lord of vows; verily for a year Agni, lord of vows, causes him to take up the vow who has slain his foe (vrtra). Thereafter he may sacrifice at will. No one who is not a Soma sacrificer should offer the Samnayya. For the milk of him who is not a Soma sacrificer is imperfect, and if one who is not a Soma sacrificer offers the Samnayya he is a thief and does wrong, and (his milk) is poured forth in vain. A Soma sacrificer only should offer the Samnayya. Soma is milk, the Samnayya is milk; verily with milk he places milk in himself. The moon deprives him of offspring and cattle, and makes his enemy wax great on whose sacrifice when offered it rises in the east [1]. He should divide the rice grains into three parts; the mean size he should make into a cake on eight potsherds for Agni, the giver, the largest lie should give as a mess to Indra, the bestower, the smallest (he should give) as a mess in boiled (milk) to Visnu Çipivista. Agni thus generates offspring for him; Indra gives it in crease; Visnu is the sacrifice, and Çipi cattle; verily on the sacrifice and cattle he rests. He should not offer twice [2]. If he were to offer now with the first he would make a failure with the second; if with the second now, he would make a failure with the first; there is no offering at all and no sacrifice, for that cause a son is born shamefaced and retiring. One offering only should one make; a valiant son is born to him. One should disregard this and offer twice. With the first (offering) one grasps the mouth of the sacrifice, and sacrifices with the second.