Deuteronomy 6:8
And thou shalt bind them for a sign upon thine hand, and they shall be as frontlets between thine eyes.
Cross-reference
Deuteronomy 11:18 repeats the command to bind God's words on hands and forehead, reinforcing constant remembrance.
Deuteronomy 27:3 commands writing the law on stones after crossing the Jordan—another external memorial of God's words, like the binding here.
Exodus 13:9 uses identical language about a sign on hand and memorial between eyes for the Passover, linking the same practice.
Exodus 13:16 also commands a sign on hand and frontlets on forehead for redemption of firstborn, mirroring this instruction.
In Matthew 23:5, Jesus condemns the Pharisees for enlarging phylacteries—a literal practice from this command—turning a heart reminder into public display.
Revelation 13:16 describes the beast's mark on hand or forehead—a dark parody of this command to bear God's words as a sign.
Proverbs 3:3 uses metaphorical binding around neck and writing on heart, shifting from literal to internalized remembrance.
Proverbs 6:21 says bind my commands on heart and tie around neck, a poetic echo of the physical binding here.
Proverbs 7:3 urges binding on fingers and writing on heart, similar imagery of keeping God's word close.