Exodus 4:23-25

Revised Standard Version

²³ and I say to you, “Let my son go that he may serve me”; if you refuse to let him go, behold, I will slay your first-born son.’”

²⁴ At a lodging place on the way the Lord met him and sought to kill him. ²⁵ Then Zippo′rah 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!”