Cross reference
Proverbs 4:21
21 Let them not depart from your eyes. Keep them in the midst of your heart.
Proverbs 3:21
21 My son, let them not depart from your eyes. Keep sound wisdom and discretion:
Proverbs 2:1
1 My son, if you will receive my words, And store up my commandments within you;
Psalms 40:8
8 I delight to do your will, my God. Yes, your law is within my heart."
Proverbs 3:3
3 Don't let kindness and truth forsake you. Bind them around your neck. Write them on the tablet of your heart.
Proverbs 7:1-2
1 My son, keep my words. Lay up my commandments within you.
2 Keep my commandments and live; Guard my teaching as the apple of your eye.