21 And the Lord said to Moses, “When you go back to Egypt, see that you do before Pharaoh all the ^smiracles that I have put in your power. But ^tI will harden his heart, so that ^uhe will not let the people go.

9 “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.’”

10 Moses and Aaron did all these wonders before Pharaoh, and ^mthe Lord hardened Pharaoh’s heart, and ⁿhe did not let the people of Israel go out of his land.