Exodus 4:21-31

21And the LORD said unto Moses, When thou goest back into Egypt, see that thou do before Pharaoh all the wonders which I have put in thine hand: but I will harden his heart, and he will not let the people go. 22And thou shalt say unto Pharaoh, Thus saith the LORD, Israel is my son, my firstborn: 23and I have said unto thee, Let my son go, that he may serve me; and thou hast refused to let him go: behold, I will slay thy son, thy firstborn. 24And it came to pass on the way at the lodging place, that the LORD met him, and sought to kill him. 25Then Zipporah took a flint, and cut off the foreskin of her son, and cast it at his feet; and she said, Surely a bridegroom of blood art thou to me. 26So he let him alone. Then she said, A bridegroom of blood art thou, because of the circumcision. 27And the LORD said to Aaron, Go into the wilderness to meet Moses. And he went, and met him in the mountain of God, and kissed him. 28And Moses told Aaron all the words of the LORD wherewith he had sent him, and all the signs wherewith he had charged him. 29And Moses and Aaron went and gathered together all the elders of the children of Israel: 30and Aaron spake all the words which the LORD had spoken unto Moses, and did the signs in the sight of the people. 31And the people believed: and when they heard that the LORD had visited the children of Israel, and that he had seen their affliction, then they bowed their heads and worshipped.