27. These are those who speak to Pharaoh, king of Egypt, in order to lead the sons of Israel out of Egypt. These are Moses and Aaron,
28. in the day when the Lord spoke to Moses in the land of Egypt.
29. And the Lord spoke to Moses, saying: "I am the Lord. Speak to Pharaoh, king of Egypt, all that I speak to you."
30. And Moses said in the sight of the Lord: "Lo, I am of uncircumcised lips, how will Pharaoh listen to me?"