Rigveda 9.070.01

For the threefold he milked the seven kine, the true-souled first on the earlier heaven. He fashioned four other lovely worlds in the bright shell which thus increased.

For him in the ancient sacrifice thrice seven kine milk forth the right mixture; he makes four other beautiful waters for purification when he is nourished with the sacrifices.

THE three times seven Milch-kine in the eastern heaven have for this Soma poured the genuine milky draught. Four other beauteous Creatures hath he made for his adornment, when he waxed in strength through holy rites.