Numbers 21:22-23

22“Let me pass through your land. We will not turn aside into fields or vineyards; we will not drink water from wells. We will go by the King’s Highway until we have passed through your territory.”

23But Sihon would not allow Israel to pass through his territory. So Sihon gathered all his people together and went out against Israel in the wilderness, and he came to Jahaz and fought against Israel.