So Moses took his wife and his sons, and caused them to ride upon the ass, and he returned to the land of Egypt, - and Moses took the staff of God in his hand. And Yahweh said unto Moses, When thou goest to return to Egypt, see as touching all the wonders which I have put in thy hand, that thou do them before Pharaoh - but, I, will let his heart wax bold, and he will not suffer the people to go. Then shalt thou say unto Pharaoh, Thus, saith Yahweh - My son - my firstborn, is Israel; read more.
Therefore I say unto thee, Let my son go, that he may serve me, But if thou refuse to let him go, behold, I, am going to slay, thy son, thy firstborn. And it came to pass, on the way, in the resting-place for the night, that Yahweh fell upon him, and sought to kill him. So Zipporah took a sharp stone and cut off the foreskin of her son, and cast it down at his feet, - and said - Surely, a bridegroom by rites of blood, art thou to me! So he let him go, Then, it was that she said, A bridegroom by rites of blood - with regard to the rites of circumcision.