YV 4.7g

Then indeed did they discern the world of heaven, and went to the world of heaven. Those, who knowing thus perform (the rite) of thirty six nights, discern the world of heaven, and go to the world of heaven. The Atiratra is light [1]; verily they put light before them, to reveal the world of heaven. There are Sadahas; six are the seasons; verily in the seasons they find support. There are four (Sadahas); four are the quarters; verily in the quarters they find support. There can be no Sattra where there is no Chandoma; in that there are Chandomas, there is the Sattra. The gods they win by the Prsthas, the cattle by the Chandomas. The Prsthas are force and strength, the Chandomas cattle; verily in force [2] and strength they find support. (The rite has) thirty-six nights; the Brhati has thirty-six syllables, cattle are connected with the Brhati; verily by the Brhati they win cattle. The Brhati obtained the sovereignty over the metres. They obtain sovereignty who knowing thus perform (the rite) of thirty-six nights; verily they go to the world of heaven. There are Atiratras on either side, for the securing of the world of heaven. Vasistha, his sons slain, desired, 'May I win offspring, and defeat the Sauddsas.' He saw this (rite) of forty-nine nights; he grasped it, and sacrificed with it. Then indeed did he win offspring and defeated the Sauddsas. Those, who knowing thus perform (the rite) of forty-nine nights, win offspring and defeat their enemies. There are three Agnistomas with the Trivrt; verily they sharpen the point of the bolt. There are ten Pañcadaças; the bolt is fifteenfold [1]; verily they take away the bolt from their rivals. The tenth day has a Sodaçin; verily they place strength in the bolt. There axe twelve Saptadaças, to win food; verily also they are propagated by them. There is a Prsthya Sadaha.