New Revised Standard Version
“When 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.’”

New American Bible
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.”

Douay-Rheims Bible
When Pharao shall say to you, Shew signs; thou shalt say to Aaron: Take thy rod, and cast it down before Pharao, and it shall be turned into a serpent.

When Pharao shall say to you, Shew signs; thou shalt say to Aaron: Take thy rod, and cast it down before Pharao, and it shall be turned into a serpent.

shew

Isaiah 7:11 Ask thee a sign of the Lord thy God, either unto the depth of hell, or unto the height above.

Matthew 12:39 Who answering said to them: An evil and adulterous generation seeketh a sign: and a sign shall not be given it, but the sign of Jonas the prophet.

John 2:18 The Jews, therefore, answered, and said to him: What sign dost thou shew unto us, seeing thou dost these things?

John 6:30 They said therefore to him: What sign therefore dost thou shew that we may see and may believe thee? What dost thou work?

John 10:38 But if I do, though you will not believe me, believe the works: that you may know and believe that the Father is in me and I in the Father.

take

Exodus 7:10-12 So Moses and Aaron went in unto Pharao, and did as the Lord had commanded. And Aaron took the rod before Pharao and his servants, and it was turned into a serpent. . . .

Exodus 4:2,17,20 Then he said to him: What is that thou holdest in thy hand? He answered: A rod. . . .

Exodus 9:23 And Moses stretched forth his rod towards heaven, and the Lord sent thunder and hail, and lightnings running along the ground: and the Lord rained hail upon the land of Egypt.

Exodus 10:13 And Moses stretched forth his rod upon the land of Egypt: and the Lord brought a burning wind all that day, and night; and when it was morning, the burning wind raised the locusts.

a serpent

Psalm 74:12,13 But God is our king before ages: he hath wrought salvation in the midst of the earth. . . .

Ezekiel 29:3 Speak, and say: Thus saith the Lord God: Behold, I come against thee, Pharao king of Egypt, thou great dragon that liest in the midst of thy rivers, and sayest: The river is mine, and I made myself.