Proverbs 7:1-3 (KJV)
Keep my commandments and live, and keep my law and teaching as the apple (the pupil) of your eye.
Bind them on your fingers; write them on the tablet of your heart.
Say to skillful and godly Wisdom, You are my sister, and regard understanding or insight as your intimate friend.

My son, keep my words, Doctrines and instructions; which, as a father to a son, or a master to his scholars, he had delivered; these he would have him observe and attend to