The word(s) "hearts" appears 136 time(s) in 127 verse(s) in Quran in Muhammad Habib Shakir translation.

(91) Allah has revealed the best announcement, a book conformable in its various parts, repeating, whereat do shudder the skins of those who fear their Lord, then their skins and their hearts become pliant to the remembrance of Allah; this is Allah's guidance, He guides with it whom He pleases; and (as for) him whom Allah makes err, there is no guide for him.

(92) And when Allah alone is mentioned, the hearts of those who do not believe in the hereafter shrink, and when those besides Him are mentioned, lo! they are joyful.

(93) And warn them of the day that draws near, when hearts shall rise up to the throats, grieving inwardly; the unjust shall not have any compassionate friend nor any intercessor who should be obeyed.

(94) And they say: Our hearts are under coverings from that to which you call us, and there is a heaviness in our ears, and a veil hangs between us and you, so work, we too are working.

(95) And certainly We had established them in what We have not established you in, and We had given-- them ears and eyes and hearts, but neither their ears, nor their eyes, nor their hearts availed them aught, since they denied the communications of Allah, and that which they mocked encompassed them.

(96) And there are those of them who seek to listen to you, until when they go forth from you, they say to those who have been given the knowledge: What was it that he said just now? These are they upon whose hearts Allah has set a seal and they follow their low desires.

(97) And those who believe say: Why has not a chapter been revealed? But when a decisive chapter is revealed, and fighting is mentioned therein you see those in whose hearts is a disease look to you with the look of one fainting because of death. Woe to them then!

(98) Do they not then reflect on the Quran? Nay, on the hearts there are locks.

(99) Or do those in whose hearts is a disease think that Allah will not bring forth their spite?

(100) He it is Who sent down tranquillity into the hearts of the believers that they might have more of faith added to their faith-- and Allah's are the hosts of the heavens and the earth, and Allah is Knowing, Wise--