Moses and Aaron Sent to Pharaoh — Exodus

28It came about on the day when the LORD spoke to Moses in the land of Egypt. 29The LORD spoke to Moses, saying, "I am the LORD. Speak to Pharaoh king of Egypt all that I am speaking to you." 30Moses said before the LORD, "Look! I am uncircumcised of lips, and how will Pharaoh listen to me?"

Chapter 7

1The LORD said to Moses, "See, I have made you God to Pharaoh, and Aaron your brother shall be your prophet." 2You shall speak all that I command you, and Aaron your brother shall speak to Pharaoh, and he shall send the sons of Israel out of his land. 3I will harden Pharaoh's heart, and I will multiply my signs and my wonders in the land of Egypt. 4Pharaoh will not listen to you, and I will lay my hand on Egypt, and I will bring my armies, my people the sons of Israel, out of the land of Egypt by great judgments. 5The Egyptians will know that I am the LORD when I stretch out my hand against Egypt and bring the sons of Israel out from among them. 6Moses and Aaron did just as the LORD had commanded them; thus they did. 7Moses was eighty years old and Aaron was eighty-three years old when they spoke to Pharaoh.