In the words indras cha Visno yad apaspridhetham [RV 6.69.8] (there is hinted) that Indra and Visnu fought with the Asuras. After they had defeated them, they said to them, Let us divide! The Asuras accepted the offer. Indra then said, All through which Visnu makes his three steps is ours, the other part is yours. Then Indra stepped through these (three worlds), then over the Vedas, and (lastly) over Vach.