Exodus 4:21-22

New International Version

²¹ The Lord said to Moses, “When you return to Egypt, see that you perform before Pharaoh all the wonders^(A) I have given you the power to do. But I will harden his heart^(B) so that he will not let the people go.^{(C) 22} Then say to Pharaoh, ‘This is what the Lord says: Israel is my firstborn son,^(D)