Cross reference
Proverbs 4:21
21 Let them not depart from thine eyes; keep them in the midst of thine heart.
Proverbs 3:21
21 My son, let not them depart from thine eyes: keep sound wisdom and discretion:
Proverbs 2:1
1 My son, if thou wilt receive my words, and hide my commandments with thee;
Psalms 40:8
8 I delight to do thy will, O my God: yea, thy law is within my heart.
Proverbs 3:3
3 Let not mercy and truth forsake thee: bind them about thy neck; write them upon the table of thine heart:
Proverbs 7:1-2
1 My son, keep my words, and lay up my commandments with thee.
2 Keep my commandments, and live; and my law as the apple of thine eye.