Pharaoh is not going to listen to you, but I will have my way against Egypt and bring out my soldiers, my people the Israelites, from Egypt by mighty acts of judgment.
"When Pharaoh speaks to you and says, 'Prove yourselves. Perform a miracle,' then tell Aaron, 'Take your staff and throw it down in front of Pharaoh: It will turn into a snake.'"
Moses and Aaron went to Pharaoh and did what GOD commanded. Aaron threw his staff down in front of Pharaoh and his servants, and it turned into a snake.
and say to him, 'GOD, the God of the Hebrews, sent me to you with this message, "Release my people so that they can worship me in the wilderness." So far you haven't listened.
GOD said to Moses, "Tell Aaron, 'Take your staff and wave it over the waters of Egypt--over its rivers, its canals, its ponds, all its bodies of water--so that they turn to blood.' There'll be blood everywhere in Egypt--even in the pots and pans."
Moses and Aaron did exactly as GOD commanded them. Aaron raised his staff and hit the water in the Nile with Pharaoh and his servants watching. All the water in the Nile turned into blood.