Numbers 21:21-24

21And Israel sent messengers unto Sihon king of the Amorites, saying, 22Let me pass through thy land: we will not turn aside into field, or into vineyard; we will not drink of the water of the wells: we will go by the king’s highway, until we have passed thy border. 23And Sihon would not suffer 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. 24And Israel smote him with the edge of the sword, and possessed his land from the Arnon unto the Jabbok, even unto the children of Ammon; for the border of the children of Ammon was strong.