Exodus 13:8-10

8And 1you shall tell your son on that day, saying, ‘It is because of what the Lord did for me when I came out of Egypt.’ 9And 2it shall 3serve as a sign to you on your hand, and as a reminder 4on your forehead, that the law of the Lord may be in your mouth; for with 5a powerful hand the Lord brought you out of Egypt. 10Therefore, you shall 6keep this ordinance at its appointed time from 7year to year.