Exodus 7:9

Now if Pharao should speak to you, saying, Give us a sign or a wonder, then shalt thou say to thy brother Aaron, Take thy rod and cast it upon the ground before Pharao, and before his servants, and it shall become a serpent.

When Pharaoh shall speak unto you, saying, Shew a miracle for you: then thou shalt say unto Aaron, Take thy rod, and cast it before Pharaoh, and it shall become a serpent.

“When Pharaoh speaks to you, saying, ‘Perform a miracle!’ then you shall tell Aaron, ‘Take your rod, and cast it down before Pharaoh, and it will become a serpent.’”