Targum su Numeri 21:34

And it was, when Mosheh saw Og, he trembled before him, stricken with fear: but he (soon) answered and said, This is Og the Wicked, who taunted Abraham our father and Sarah, saying: You are like trees planted by the water channels, but bring forth no fruit: therefore hath the Holy One, blessed be He, spared him to live through generations, that he might see the great multitude of their children, and be delivered into our hands. Then spake the Lord unto Mosheh: Fear him not, for I have delivered him into thy hand, and all his people and country; and thou shalt do to him as thou hast done to Sihon, king of the Amorites, who dwelt in Heshbon.

And when Mosheh saw Og, he said, Is not this Og the Wicked, who taunted Abraham and Sarah, and said, They are like fair trees by fountain of water, but give no fruit. Therefore the Holy One, blessed be He, hath kept him alive for many years, till the time that he should see their children and children's children, and fall by their hands. Therefore the Lord said to Mosheh, Fear him not, for I have delivered him into thy hand, and all his people, and all his land; and thou shalt do to him as thou hast done to Sichon, king of the Amorites, who dwelt in Heshbon.