Exodus 7:5 BBE

³  And I will make Pharaoh's heart hard, and my signs and wonders will be increased in the land of Egypt.

⁴  But Pharaoh will not give ear to you, and I will put my hand on Egypt, and take my armies, my people, the children of Israel, out of Egypt, after great punishments.

⁵  And the Egyptians will see that I am the Lord, when my hand is stretched out over Egypt, and I take the children of Israel out from among them.

⁶  And Moses and Aaron did so: as the Lord gave them orders, so they did.

⁷  And Moses was eighty years old, and Aaron eighty-three years old, when they gave the Lord's word to Pharaoh.