YV 1.7b

From the middle he meted out the Saptadaça Stoma. After it the All-gods as deities were created, the Jagati metre, the Vairupa Saman, of men the Vaiçya, of cattle cows. Therefore are they to be eaten, for they were created from the receptacle of food. Therefore are they more numerous than others, for they were created after the most numerous of the gods. From his feet he meted out the Ekavinça Stoma. After it the Anustubh metre [5] was created, the Vairaja Saman, of men the Çudra, of cattle the horse. Therefore the two, the horse and the Çudra, are dependent on others. Therefore the Çudra is not fit for the sacrifice, for he was not created after any gods. Therefore they depend on their feet, for they were created from the feet. The Trivrt is the breaths; the Pañcadaça the half-months; the Saptadaça Prajapati; these worlds are three; the Ekavinça is the sun yonder. In this they rest, in this they find support. He who knows thus rests on this, finds, support in this. At the morning pressing he keeps glorifying the Trivrt Stoma by the Gayatri metre; the Pañcadaça Stoma by the Trivrt, which is splendour; the Saptadaça by the Pañcadaça which is force and strength; the Ekavinça by the Saptadaça which is connected with Prajapati and causes begetting. Verily thus Stoma glorifies Stoma; verily also Stoma leads Stoma forth. As many as are the Stomas, so many are desires, so many the worlds, so many the lights; verily so many Stomas, so many desires, so many worlds, so many lights does he win. The theologians say, 'He indeed would really sacrifice, who having sacrificed with the Agnistoma should also sacrifice with the Sarvastoma.' If they omit the Trivrt Stoma, then his vital airs are omitted, but he who offers the sacrifice does so with the wish, 'May it be in my vital airs. If they omit the Pañcadaça Stoma, his strength is omitted, but he who offers the sacrifice does so with the wish, 'May it be in my strength.