Exodus 3:10

8I have come down to deliver them out of the hand of the Egyptians, and to bring them up out of that land to a good and large land, to a land flowing with milk and honey; to the place of the Canaanite, the Hittite, the Amorite, the Perizzite, the Hivite, and the Jebusite.

9Now, behold, the cry of the children of Israel has come to me. Moreover I have seen the oppression with which the Egyptians oppress them.

10Come now therefore, and I will send you to Pharaoh, that you may bring my people, the children of Israel, out of Egypt.”

11Moses said to God, “Who am I, that I should go to Pharaoh, and that I should bring the children of Israel out of Egypt?”

12He said, “Certainly I will be with you. This will be the token to you, that I have sent you: when you have brought the people out of Egypt, you shall serve God on this mountain.”