Exodus 4:21-23

Douay-Rheims 1899 American Edition

²¹ And the Lord said to him as he was returning into Egypt: See that thou do all the wonders before Pharao, which I have put in thy hand: I shall harden his heart, and he will not let the people go.

²² And thou shalt say to him: Thus saith the Lord: Israel is my son, my firstborn.

²³ I have said to thee: Let my son go, that he may serve me, and thou wouldst not let him go: behold I will kill thy son, thy firstborn.