Exodus 7:7-9

Revised Standard Version Catholic Edition

⁷ Now Moses was eighty years old, and Aaron eighty-three years old, when they spoke to Pharaoh.

Aaron’s Miraculous Rod

⁸ And the Lord said to Moses and Aaron, ⁹ “When Pharaoh says to you, ‘Prove yourselves by working a miracle,’ then you shall say to Aaron, ‘Take your rod and cast it down before Pharaoh, that it may become a serpent.’”