Exodus 13:8-14

8And thou shalt show thy son in that day, saying, This is done because of that which the LORD did to me when I came forth out of Egypt. 9And it shall be for a sign to thee upon thy hand, and for a memorial between thy eyes, that the LORD’S law may be in thy mouth: for with a strong hand hath the LORD brought thee out of Egypt. 10Thou shalt therefore keep this ordinance in its season from year to year.

11And it shall be when the LORD shall bring thee into the land of the Canaanites, as he swore to thee and to thy fathers, and shall give it to thee, 12That thou shall set apart to the LORD all that openeth the womb, and every firstling that cometh of a beast which thou hast; the males shall be the LORD’S.1 13And every firstling of a donkey thou shalt redeem with a lamb; and if thou wilt not redeem it, then thou shalt break his neck: and all the firstborn of man among thy children shalt thou redeem.2 14And it shall be when thy son asketh thee in time to come, saying, What is this? that thou shalt say to him, By strength of hand the LORD brought us out from Egypt, from the house of bondage:3