Numbers 21
23 Ref Sihon would not allow Israel to pass through his border: but Sihon gathered all his people together, and went out against Israel into the wilderness, and came to Jahaz; and he fought against Israel.
24 Ref Israel struck him with the edge of the sword, and possessed his land from the Arnon to the Jabbok, even to the children of Ammon; for the border of the children of Ammon was strong.
25 Ref Israel took all these cities: and Israel lived in all the cities of the Amorites, in Heshbon, and in all the towns of it.