Exodus 7:9

6 And Moses doth -- Aaron also -- as Jehovah commanded them; so have they done;

7 and Moses [is] a son of eighty years, and Aaron [is] a son of eighty and three years, in their speaking unto Pharaoh.

8 And Jehovah speaketh unto Moses and unto Aaron, saying,

9 `When Pharaoh speaketh unto you, saying, Give for yourselves a wonder; then thou hast said unto Aaron, Take thy rod, and cast before Pharaoh -- it becometh a monster.`

10 And Moses goeth in -- Aaron also -- unto Pharaoh, and they do so as Jehovah hath commanded; and Aaron casteth his rod before Pharaoh, and before his servants, and it becometh a monster.

11 And Pharaoh also calleth for wise men, and for sorcerers; and the scribes of Egypt, they also, with their flashings, do so,

12 and they cast down each his rod, and they become monsters, and the rod of Aaron swalloweth their rods;