Exodus 4:24, 25, 26

And it came to pass by the way in the inn, that the LORD met him, and sought to kill him.

Then Zippo´rah took a sharp stone, and cut off the foreskin of her son, and cast it at his feet, and said, Surely a bloody husband art thou to me.

So he let him go: then she said, A bloody husband thou art, because of the circumcision.