Exodus 13:16

13 `And every firstling of an ass thou dost ransom with a lamb, and if thou dost not ransom it, then thou hast beheaded it: and every first-born of man among thy sons thou dost ransom.

14 `And it hath been, when thy son asketh thee hereafter, saying, What is this? that thou hast said unto him, By strength of hand hath Jehovah brought us out from Egypt, from a house of servants;

15 yea, it cometh to pass, when Pharaoh hath been pained to send us away, that Jehovah doth slay every first-born in the land of Egypt, from the first-born of man even unto the first-born of beast; therefore I am sacrificing to Jehovah all opening a womb who are males, and every first-born of my sons I ransom;

16 and it hath been for a token on thy hand, and for frontlets between thine eyes, for by strength of hand hath Jehovah brought us out of Egypt.'

17 And it cometh to pass in Pharaoh's sending the people away, that God hath not led them the way of the land of the Philistines, for it is near; for God said, `Lest the people repent in their seeing war, and have turned back towards Egypt;'

18 and God turneth round the people the way of the wilderness of the Red Sea, and by fifties have the sons of Israel gone up from the land of Egypt.

19 And Moses taketh the bones of Joseph with him, for he certainly caused the sons of Israel to swear, saying, `God doth certainly inspect you, and ye have brought up my bones from this with you.'