Then Moses and Aaron went to Pharaoh and did just as the Lord had commanded. Aaron threw his staff down before Pharaoh and his servants, and it turned into a serpent.
In the morning, just when he sets out for the water, go to Pharaoh and present yourself by the bank of the Nile, holding in your hand the staff that turned into a snake.
This, then, is what Moses and Aaron did, exactly as the Lord had commanded. Aaron raised his staff and struck the waters in the Nile in full view of Pharaoh and his servants, and all the water in the Nile was changed into blood.
When Pharaoh demands of you, “Produce a sign or wonder,” you will say to Aaron: “Take your staff and throw it down before Pharaoh, and it will turn into a serpent.”
Though they hide on the summit of Carmel, there too I will hunt them down and take them; Though they hide from my gaze at the bottom of the sea, there I will command the serpent to bite them.
They will pick up serpents [with their hands], and if they drink any deadly thing, it will not harm them. They will lay hands on the sick, and they will recover.” The Ascension of Jesus.