Exodus 4:24, 25, 26

At a lodging place on the way, the LORD met him and sought to kill him.

Then Zipporah took a sharp stone, and cut off the foreskin of her son, and threw it at his feet, and said, “Surely a bloody husband are you to me.”

So He let him go. Then she said, “A bloody husband you are , because of the circumcision.”