Deuteronomy 11:13
And it shall come to pass, if you shall listen 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,
Torrey's Topical Textbook—AKJV

Romans 6:17
But God be thanked, that you were the servants of sin, but you have obeyed from the heart that form of doctrine which was delivered you.
Torrey's Topical Textbook—AKJV