Thematic Bible: Consecration of the firstborn

And it shall be when thy son shall ask thee in time to come, saying, What is this? Then shalt thou say unto him: With strength of hand, did Yahweh bring us forth out of Egypt out of the house of slaves. And it came to pass when Pharaoh had shown himself too hardened to let us go, then did Yahweh slay every firstborn in the land of Egypt, from the firstborn of men even unto the firstborn of beasts. For this cause, am, I, sacrificing to Yahweh whatsoever is born first, of the males, and every firstborn of my sons, must I redeem. And it shall be for a sign upon thy hand, and for frontlets between thine eyes, - that, with strength of hand, did Yahweh bring us forth out of Egypt.