Proverbs 6:21

"Bind them continually upon thine heart, and tie them about thy neck."

Cross References (ranked by relevance)

Let not mercy and truth forsake thee: bind them about thy neck; write them upon the table of thine heart:

Forasmuch as ye are manifestly declared to be the epistle of Christ ministered by us, written not with ink, but with the Spirit of the living God; not in tables of stone, but in fleshy tables of the heart.

Exodus 13:16

And it shall be for a token upon thine hand, and for frontlets between thine eyes: for by strength of hand the LORD brought us forth out of Egypt.

Deuteronomy 6:8

And thou shalt bind them for a sign upon thine hand, and they shall be as frontlets between thine eyes.

Proverbs 4:6

Forsake her not, and she shall preserve thee: love her, and she shall keep thee.

Proverbs 4:21

Let them not depart from thine eyes; keep them in the midst of thine heart.