Numbers 21:22-23

22They said, ‘Please let us travel through your country. We will not go through any fields or through any vineyards. We will not even drink water from your wells. We will go along the main road. We will not leave that road on either side until we have gone through all your land.’

23But Sihon would not let the Israelites travel through his land. Sihon and his army marched to Jahaz, in the desert. They attacked the Israelites there.