Exodus 13:11-16 - The Feast Of Unleavened Bread

¹¹ 'And it hath been, when Jehovah bringeth thee in unto the land of the Canaanite, as He hath sworn to thee and to thy fathers, and hath given it to thee, ¹² that thou hast caused every one opening a womb to pass over to Jehovah, and every firstling -- the increase of beasts which thou hast: the males are Jehovah's. 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.'