Thematic Bible: Consecration of the firstborn

And it shall be, when thy son asks thee in time to come, saying, What is this? that thou shall say to him, By strength of hand LORD brought us out from Egypt, from the house of bondage. And it came to pass, when Pharaoh would hardly let us go, that LORD slew all the first-born in the land of Egypt, both the first-born of man, and the first-born of beast. Therefore I sacrifice to LORD all that opens the womb, being And it shall be for a sign upon thy hand, and for frontlets between thine eyes, for by strength of hand LORD brought us forth out of Egypt.