4:20And Moses took his wife and his sons, and set them upon an ass, and he returned to the land of Egypt: and Moses took the rod of God in his hand.

4:21And the LORD said unto Moses, When thou goest to return into Egypt, see that thou do all those wonders before Pharaoh, which I have put in thine hand: but I will harden his heart, that he shall not let the people go.

4:22And thou shalt say unto Pharaoh, Thus saith the LORD, Israel is my son, even my firstborn:

4:23And I say unto thee, Let my son go, that he may serve me: and if thou refuse to let him go, behold, I will slay thy son, even thy firstborn.

4:24And it came to pass by the way in the inn, that the LORD met him, and sought to kill him.

4:25Then Zipporah 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.

4:26So he let him go: then she said, A bloody husband thou art, because of the circumcision.