Deuteronomy 3:2, 11

And the LORD said to me, ‘Do not fear him, for I have delivered him and all his people and his land into your hand; you shall do to him as you did to Sihon king of the Amorites, who dwelt at Heshbon.’

“For only Og king of Bashan remained of the remnant of the giants. Indeed his bedstead was an iron bedstead. (Is it not in Rabbah of the people of Ammon?) Nine cubits is its length and four cubits its width, according to the standard cubit.