Exodus 4:24-26

24On the way to Egypt, there was a place where people could rest on their journey. The Lord met Moses there and he wanted to kill Moses.

25But Zipporah took a sharp stone and she cut off her son's foreskin with the stone. She touched Moses' feet with the foreskin. She said, ‘You are a husband of blood to me.’

26So God did not do anything bad to Moses. Then Zipporah said to Moses, ‘You are a husband of blood, because of this circumcision.’