Numbers 21:21-24

21Israel sent messengers to say to King Sihon of the Amorites,

22“Let us travel through your land. We won’t go into the fields or vineyards. We won’t drink any well water. We will travel the King’s Highway until we have traveled through your territory.”

23But Sihon would not let Israel travel through his territory. Instead, he gathered his whole army and went out to confront Israel in the wilderness. When he came to Jahaz, he fought against Israel.

24Israel struck him with the sword and took possession of his land from the Arnon to the Jabbok, but only up to the Ammonite border, because it was fortified.