Deuteronomy 2:24-25

24Then God said, ‘Now go across Arnon valley. Look, I have given you the land of King Sihon, the Amorite. He is the king of Heshbon. You must go and fight against him. Attack him and take his land for yourselves.

25Today I will begin to make all the people in the world afraid of you. They will hear reports about you. That will cause them to be very frightened. They will shake with fear!’