Matthew 22:37
And he said to him, You shall love the Lord your God with all your heart, and all your soul, and all your mind.
Acts 11:23
who having come and seen the grace of God rejoiced, and exhorted all to adhere to the Lord with the purpose of the heart;
2 Corinthians 11:2-3
For I am zealous for you with a godly zeal, for I joined you, a chaste virgin, to one husband, to present to Christ;
2 Timothy 4:8
henceforth there is laid up for me the crown of righteousness, which the Lord, the righteous Judge will give me in that day, and not me only but all who love his appearing.
1 John 5:2-3
By this we know that we love the children of God, when we love God and keep his commandments.