I started off searching for the verse that says that God searches the hearts and wow did I find some gems.. I especially love the Ec 3:11. I did not post them all because I think that less is more in situations like this.
Pr 21:2 Every way of a man is right in his own eyes, But the Lord weighs the
hearts.
Ps 33:15 He fashions their
hearts individually; He considers all their works
Pr 24:12 If you say, "Surely we did not know this," Does not He who weighs the
hearts consider it? He who keeps your soul, does He not know it? And will He not render to each man according to his deeds?
Ec 3:11 He has made everything beautiful in its time. Also He has put eternity in their
hearts, except that no one can find out the work that God does from beginning to end.
Romans 8:27 Now He who searches the
hearts knows what the mind of the Spirit is, because He makes intercession for the saints according to the will of God.
Ga 4:6 And because you are sons, God has sent forth the Spirit of His Son into your
hearts, crying out, "Abba, Father!"
Col 3:15 And let the peace of God rule in your
hearts, to which also you were called in one body; and be thankful.