Deuteronomy 3:2-3

And the LORD said to me, ‘Do not fear him, for I have delivered him and all his people and his land into your hand; you shall do to him as you did to Sihon king of the Amorites, who dwelt at Heshbon.’ “So the LORD our God also delivered into our hands Og king of Bashan, with all his people, and we attacked him until he had no survivors remaining.