Exodus 3:9-12

Now, behold, the cry of the sons of Israel has come to Me; furthermore, I have seen the oppression with which the Egyptians are oppressing them. Therefore, come now, and I will send you to Pharaoh, so that you may bring My people, the sons of Israel, out of Egypt.” But Moses said to God, “Who am I, that I should go to Pharaoh, and that I should bring the sons of Israel out of Egypt?” And He said, “Certainly I will be with you, and this shall be the sign to you that it is I who have sent you: when you have brought the people out of Egypt, you shall worship God at this mountain.”