Exodus 13:5-9

5And it shall be when Jehovah hath brought thee into the land of the Canaanite and the Hittite and the Amorite and the Hivite and the Jebusite, which he swore to thy fathers to give thee, a land flowing with milk and honey, that thou shalt keep this service in this month.

6Seven days shalt thou eat unleavened bread; and in the seventh day is a feast to Jehovah.

7Unleavened bread shall be eaten the seven days; and leavened bread shall not be seen with thee, neither shall there be leaven seen with thee in all thy borders.

8And thou shalt inform thy son in that day, saying, It is because of what Jehovah did to me when I came out of Egypt.

9And it shall be for a sign to thee on thy hand, and for a memorial between thine eyes, that the law of Jehovah may be in thy mouth; for with a powerful hand hath Jehovah brought thee out of Egypt.