EXO 34:10

10 Yahweh replied, “Note this: I am going to make a solemn agreement [with the Israeli people]. As they are watching, I will perform great miracles. They will be miracles that no one has ever done on the earth in any nation. All the people who are near you will see the great things that I, Yahweh, will do. I will do awesome things for you [all].