Exodus 4:21-23

Revised Geneva Translation

²¹ And the LORD said to Moses, “When you have entered and come into Egypt again, see that you do before Pharaoh all the wonders which I have put in your hand. But I will harden his heart; and he shall not let the people go.

²² “Then you shall say to Pharaoh, ‘Thus says the LORD: “Israel is My son, My firstborn.

²³ “Therefore I say to you, ‘Let My son go, so that he may serve Me. If you refuse to let him go, behold, I will kill your son, your firstborn.’”’”