Exodus 4:23-26

Living Bible

²³ and I have commanded you to let him go away and worship me, but you have refused: and now see, I will slay your eldest son.”’”

²⁴ As Moses and his family were traveling along and had stopped for the night, Jehovah appeared to Moses and threatened to kill him. ^25-26 Then Zipporah his wife took a flint knife and cut off the foreskin of her young son’s penis, and threw it against Moses’ feet, remarking disgustedly, “What a blood-smeared husband you’ve turned out to be!”

Then God left him alone.