Deuteronomy 3:2-3

But the LORD told me, ‘Do not be afraid of him, for I have given you victory over Og and his entire army, and I will give you all his land. Treat him just as you treated King Sihon of the Amorites, who ruled in Heshbon.’ “So the LORD our God handed King Og and all his people over to us, and we killed them all. Not a single person survived.