And thou shalt love the Lord thy God with all thine heart, and with all thy soul, and with all thy might. (6:5)

--Joshua--

But take diligent heed to do the commandment and the law, which Moses the servant of the Lord charged you, to love the Lord your God, and to walk in all his ways, and to keep his commandments, and to cleave unto him, and to serve him with all your heart and with all your soul. (22:5)

--1 Kings--

And he said, Lord God of Israel, [there is] no God like thee, in heaven above, or on earth beneath, who keepest covenant and mercy with thy servants that walk before thee with all their heart: (8:23)

--Psalms--

But his delight is in the law of the Lord; and in his law doth he meditate day and night (1:2)

Behold, thou desirest truth in the inward parts: and in the hidden part thou shalt make me to know wisdom (51:6)