Exodus 13:8-9
Exodus 13:8-9 NASB1995
You shall tell your son on that day, saying, ‘It is because of what the LORD did for me when I came out of Egypt.’ And it shall serve as a sign to you on your hand, and as a reminder on your forehead, that the law of the LORD may be in your mouth; for with a powerful hand the LORD brought you out of Egypt.