Exodus 3:20

3:20 So I will extend my hand and strike Egypt with all my wonders that I will do among them, and after that he will release you.

Exodus 34:10

34:10 He said, “See, I am going to make a covenant before all your people. I will do wonders such as have not been done in all the earth, nor in any nation. All the people among whom you live will see the work of the Lord, for it is a fearful thing that I am doing with you.