'With All Your Heart' in the Bible

And it shall come to pass, if ye shall hearken diligently to my commandments which I command you this day, to love the LORD your God, and to serve him with all your heart and with all your soul,

Thou shalt not hearken to the words of that prophet, or that dreamer of dreams: for the LORD your God proveth you, to know whether ye love the LORD your God with all your heart and with all your soul.