Judges 11:20-24

But Sihon did not trust Israel to pass through his territory; so Sihon gathered all his people and camped in Jahaz, and fought with Israel.

And the Lord, the God of Israel, handed Sihon and all his people over to Israel, and they defeated them; so Israel took possession of all the land of the Amorites, the inhabitants of that country.

So they possessed all the territory of the Amorites, from the Arnon as far as the Jabbok, and from the wilderness as far as the Jordan.

And now the Lord, the God of Israel, has driven out the Amorites from His people Israel; so should you possess it?

Do you not possess what Chemosh your god gives you to possess? So whatever the Lord our God has dispossessed before us, we will possess it.