6:28On the day when the LORD spoke to Moses in the land of Egypt, 29he said to him, “I am the LORD; tell Pharaoh king of Egypt all that I am speaking to you.” 30But Moses said in the LORD’s presence, “Since I am a poor speaker, why would Pharaoh listen to me?”
7:1The LORD said to Moses, “See, I have made you like God to Pharaoh, and your brother Aaron shall be your prophet. 2You shall speak all that I command you, and your brother Aaron shall tell Pharaoh to let the Israelites go out of his land. 3But I will harden Pharaoh’s heart, and I will multiply my signs and wonders in the land of Egypt. 4When Pharaoh does not listen to you, I will lay my hand upon Egypt and bring my people the Israelites, company by company, out of the land of Egypt by great acts of judgment. 5The Egyptians shall know that I am the LORD, when I stretch out my hand against Egypt and bring the Israelites out from among them.” 6Moses and Aaron did so; they did just as the LORD commanded them. 7Moses was eighty years old and Aaron eighty- three when they spoke to Pharaoh.
8The LORD said to Moses and Aaron, 9When Pharaoh says to you, ‘Perform a wonder,’ then you shall say to Aaron, ‘Take your staff and throw it down before Pharaoh, and it will become a snake.’ 10So Moses and Aaron went to Pharaoh and did as the LORD had commanded; Aaron threw down his staff before Pharaoh and his officials, and it became a snake. 11Then Pharaoh summoned the wise men and the sorcerers; and they also, the magicians of Egypt, did the same by their secret arts. 12Each one threw down his staff, and they became snakes; but Aaron’s staff swallowed up theirs. 13Still Pharaoh’s heart was hardened, and he would not listen to them, as the LORD had said.