"When Pharaoh will say to you, ‘Show signs,’ you shall say to Aaron, ‘Take your staff, and cast it down before Pharaoh, and it will be turned into a snake.’
Other versions
King James Version
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.English Standard Version
"When Pharaoh says to you, 'Prove yourselves by working a miracle,' then you shall say to Aaron, 'Take your staff and cast it down before Pharaoh, that it may become a serpent.'"New International Version
"When Pharaoh says to you, 'Perform a miracle,' then say to Aaron, 'Take your staff and throw it down before Pharaoh,' and it will become a snake."