Numbers 21:21-25

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 high way, 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 Arnon unto Jabbok, even unto the children of Ammon: for the border of the children of Ammon was strong.

25And Israel took all these cities: and Israel dwelt in all the cities of the Amorites, in Heshbon, and in all the towns thereof.