Numbers 21:34-35

34The LORD said to Moses, “Do not be afraid of him, for I have delivered him into your hands, along with his whole army and his land. Do to him what you did to Sihon king of the Amorites, who reigned in Heshbon.” 35So they struck him down, together with his sons and his whole army, leaving them no survivors. And they took possession of his land.