Exodus 4:21-23

Lexham English Bible

²¹ And Yahweh said to Moses, “When you go to return to Egypt, see all of the wonders that I have put in your hand, and do them before Pharaoh, and I myself will harden his heart, and he will not release the people. ²² And you must say to Pharaoh, ‘Thus says Yahweh, “Israel is my son, my firstborn.” ²³ And I said to you, “Release my son and let him serve me,” but you refused to release him. Look, I am about to kill your son, your firstborn.’”