Exodus 4:18-23

¹⁸Then Moses departed and returned to his father-in-law Jethro, and said to him, “Please, let me go, that I may return to my brothers who are in Egypt, and see if they are still alive.” And Jethro said to Moses, “Go in peace.” ¹⁹Now the Lord said to Moses in Midian, “Go back to Egypt, for all the men who were seeking your life are dead.” ²⁰So Moses took his wife and his sons and mounted them on a donkey, and returned to the land of Egypt. Moses also took the staff of God in his hand.

²¹And the Lord said to Moses, “When you go back to Egypt, see that you perform before Pharaoh all the wonders which I have put in your power; but I will harden his heart so that he will not let the people go. ²²Then you shall say to Pharaoh, ‘This is what the Lord says: “Israel is My son, My firstborn. ²³So I said to you, ‘Let My son go so that he may serve Me’; but you have refused to let him go. Behold, I am going to kill your son, your firstborn.” ’ ”