Exodus 7:14-16

14Then the Lord said to Moses, “Pharaoh’s heart is 1stubborn; he refuses to let the people go.

15Go to Pharaoh in the morning 2just as 3he is going out to the water, and position yourself to meet him on the bank of the Nile; and you shall take in your hand 4the staff that was turned into a serpent.

16And 5you shall say to him, ‘The Lord, the God of the Hebrews, sent me to you, saying, “6Let My people go, so that they may serve Me in the wilderness. But behold, you have not listened up to now.”