Exodus 4:20-26
English Standard Version
21And the Lord said to Moses, "When you go back to Egypt, see that you do before Pharaoh all the miracles that 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, ‘Thus says the Lord, Israel is my firstborn son,
23and I say to you, "Let my son go that he may serve me." If you refuse to let him go, behold, I will kill your firstborn son.’"
24At a lodging place on the way the Lord met him and sought to put him to death.
25Then Zipporah took a flint and cut off her son 's foreskin and touched Moses ' feet with it and said, "Surely you are a bridegroom of blood to me!"
26So he let him alone. It was then that she said, "A bridegroom of blood," because of the circumcision.
