¹⁵ For when Pharao was hardened, and would not let us go, the Lord slew every firstborn in the land of Egypt, from the firstborn of man to the firstborn of beasts: therefore I sacrifice to the Lord all that openeth the womb of the male sex, and all the firstborn of my sons I redeem.

¹⁸ Thou shalt keep the feast of the unleavened bread. Seven days shalt thou eat unleavened bread, as I commanded thee in the time of the month of the new corn: for in the month of the springtime thou camest out from Egypt.