Exodus 3:10-12

3:10 So now go, and I will send you to Pharaoh to bring my people, the Israelites, out of Egypt.”

3:11 Moses said to God, “Who am I, that I should go to Pharaoh, or that I should bring the Israelites out of Egypt?” 3:12 He replied, “Surely I will be with you, and this will be the sign to you that I have sent you: When you bring the people out of Egypt, you and they will serve God on this mountain.”