Deuteronomy 3:3-7

So the Lord our God also handed over to us Og, king of Bashan, with all his people, and we struck them until no survivor was left.

We captured all his cities at that time; there was not a city which we did not take from them: sixty cities, all the region of Argob, the kingdom of Og in Bashan.

All these were cities fortified with high walls, gates, and bars, besides a great many unwalled towns.

We utterly destroyed them, as we did to Sihon king of Heshbon, utterly destroying the men, women, and children of every city.

But all the animals and the spoils of the cities we took as our plunder.