Exodus 13:9

13:9 It will be a sign for you on your hand and a memorial on your forehead, so that the law of the Lord may be in your mouth, for with a mighty hand the Lord brought you out of Egypt.

Exodus 13:16

13:16 It will be for a sign on your hand and for frontlets on your forehead, for with a mighty hand the Lord brought us out of Egypt.”

Deuteronomy 6:8

6:8 You should tie them as a reminder on your forearm and fasten them as symbols on your forehead.

Deuteronomy 11:18

11:18 Fix these words of mine into your mind and being, and tie them as a reminder on your hands and let them be symbols on your forehead.