Deuteronomy 3:2-6

But the Lord said to me, ‘Do not fear him, for I have handed him and all his people and his land over to you; and you shall do to him just as you did to Sihon king of the Amorites, who lived in Heshbon.’

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.