5 verses have
hearts
in Edition Clear Qur'an by Talal Itani / Al-Fath (The Victory)

48:4It is He who sent down tranquility into the hearts of the believers, to add faith to their faith. To God belong the forces of the heavens and the earth. God is Knowing and Wise.

48:11The Desert-Arabs who remained behind will say to you, “Our belongings and our families have preoccupied us, so ask forgiveness for us.” They say with their tongues what is not in their hearts. Say, “Who can avail you anything against God, if He desires loss for you, or desires gain for you?” In fact, God is Informed of what you do.

48:12But you thought that the Messenger and the believers will never return to their families, and this seemed fine to your hearts; and you harbored evil thoughts, and were uncivilized people.

48:18God was pleased with the believers, when they pledged allegiance to you under the tree. He knew what was in their hearts, and sent down serenity upon them, and rewarded them with an imminent conquest.

48:26Those who disbelieved filled their hearts with rage—the rage of the days of ignorance. But God sent His serenity down upon His Messenger, and upon the believers, and imposed on them the words of righteousness—of which they were most worthy and deserving. God is aware of everything.