The word(s) "heart" appears 171 time(s) in 159 verse(s) in Quran in Muhammad Habib Shakir translation.

(91) And He it is Who made for you the ears and the eyes and the hearts; little is it that you give thanks.

(92) Men whom neither merchandise nor selling diverts from the remembrance of Allah and the keeping up of prayer and the giving of poor-rate; they fear a day in which the hearts and eyes shall turn about;

(93) Is there in their hearts a disease, or are they in doubt, or do they fear that Allah and His Apostle will act wrongfully towards them? Nay! they themselves are the unjust.

(94) And those who disbelieve say: Why has not the Quran been revealed to him all at once? Thus, that We may strengthen your heart by it and We have arranged it well in arranging.

(95) Except him who comes to Allah with a heart free (from evil).

(96) Upon your heart that you may be of the warners

(97) Thus have We caused it to enter into the hearts of the guilty.

(98) And the heart of Musa's mother was free (from anxiety) she would have almost disclosed it had We not strengthened her heart so that she might be of the believers.

(99) Thus does Allah set a seal on the hearts of those who do not know.

(100) O my son! surely if it is the very weight of the grain of a mustard-seed, even though it is in (the heart of) rock, or (high above) in the heaven or (deep down) in the earth, Allah will bring it (to light); surely Allah is Knower of subtleties, Aware;