Deuteronomy 6:5 TNIV
Love the Lord your God with all your heart and with all your soul and with all your strength.

Jeremiah 32:39
I will give them singleness of heart and action, so that they will always fear me and that all will then go well for them and for their children after them.

Psalms 86:11
Teach me your way, Lord,
that I may rely on your faithfulness;
give me an undivided heart,
that I may fear your name.

Matthew 6:24
“No one can serve two masters. Either you will hate the one and love the other, or you will be devoted to the one and despise the other. You cannot serve both God and money.

Matthew 22:37
Jesus replied: “‘Love the Lord your God with all your heart and with all your soul and with all your mind.’”

James 1:5-8
If any of you lacks wisdom, you should ask God, who gives generously to all without finding fault, and it will be given to you. 6 But when you ask, you must believe and not doubt, because the one who doubts is like a wave of the sea, blown and tossed by the wind. 7 Those who doubt should not think they will receive anything from the Lord; 8 they are double-minded and unstable in all they do.