YV 3.7c

Those, who knowing thus perform (the rite) of fourteen nights, prosper in both worlds, this and yonder. (The rite) is of fourteen nights, there are seven domesticated plants and seven wild; (verily it serves) to win both. In that the Prsthas are performed in succession [1], they conquer by them yonder world. In that the Prsthas are reversed, they conquer by them this world. There are two Trayastrinça Stomas in the middle; verily they attain sovereignty. (These two) are overlords; verily they become overlords of their peers. There are Atiratras on either side, for security. Prajapati went to the world of heaven. The gods followed him, and the Adityas and the cattle followed them. The gods said, 'The cattle on which we have lived have followed us.' They arranged this (rite) of fourteen nights away for them. The Adityas mounted the world of heaven with the Prsthas; they arranged the cattle in this world with the two Tryahas. By means of the Prsthas the Adityas prospered in yonder world, the cattle in this world by the Tryahas [1]. Those who, knowing thus, perform (the rite of) fourteen nights, prosper in both worlds, in this and in yonder; by the Prsthas they prosper in yonder world and by the Tryahas in this world. The three days are the Jyotis, Go, and Ayus. The Jyotis is this (earth), the Go the atmosphere, the Ayus yonder (sky); verily they mount upon these worlds. If the Prsthas were on one side, there would be a lack of balance; the Prsthas are in the middle, for balance [2]. The Prsthas are force and strength; verily they place force and strength in the middle. They proceed with the Brhat and the Rathantara (Samans). The Rathantara is this (earth), the Brhat yonder (sky); verily with them do they proceed; verily also in them they find support. These indeed are the quick paths of the sacrifice; verily by them do they proceed to the world of heaven. They mount the world of heaven turning away (from earth), who perform the Prsthas in succession.