Numbers 21:34-35

But the LORD said to Moses, “Do not fear him, for I have handed over him and all his people and his land to you; and you shall do to him just as you did to Sihon king of the Amorites, who lived at Heshbon.” So the sons of Israel killed Og and his sons and all his people, until there was no survivor left to him; and they took possession of his land.