Aitareyabrahmana 1.3.p2

1.3.p2

i. 12 (iii. 1). In the eastern quarter the gods bought Soma the king; therefore in the eastern quarter is he bought. Him from the thirteenth month they bought; therefore the thirteenth month is not known; the Soma seller is not known, for the Soma seller is evil. The strengths and powers of him when bought and going towards men went away to the quarters; them they sought to win with one verse; they could not win them; them with two, with three, with four, with five, with six, with seven they could not win; with eight they won, with eight they obtained; that is why eight has its name. Whatever he desires he attains who knows thus. Therefore in these rites eight (verses) each are repeated, to win powers and strengths.