Exodus 7:8

5 and the Egyptians have known that I [am] Jehovah, in My stretching out My hand against Egypt; and I have brought out the sons of Israel from their midst.`

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,