The word(s) "hearts" appears 130 time(s) in 121 verse(s) in Quran in Muhammad Pickthal translation.

(21) (They said:) We wish to eat thereof, that we may satisfy our hearts and know that thou hast spoken truth to us, and that thereof we may be witnesses.

(22) Of them are some who listen unto thee, but We have placed upon their hearts veils, lest they should understand, and in their ears a deafness. If they saw every token they would not believe therein; to the point that, when they come unto thee to argue with thee, the disbelievers say: This is naught else than fables of the men of old.

(23) If only, when Our disaster came on them, they had been humble! But their hearts were hardened and the devil made all that they used to do seem fair unto them!

(24) Say: Have ye imagined, if Allah should take away your hearing and your sight and seal your hearts, Who is the Allah Who could restore it to you save Allah? See how We display the revelations unto them! Yet still they turn away.

(25) We confound their hearts and their eyes. As they believed not therein at the first, We let them wander blindly on in their contumacy.

(26) That the hearts of those who believe not in the Hereafter may incline thereto, and that they may take pleasure therein, and that they may earn what they are earning.

(27) And We remove whatever rancour may be in their hearts. Rivers flow beneath them. And they say: The praise to Allah, Who hath guided us to this. We could not truly have been led aright if Allah had not guided us. Verily the messengers of our Lord did bring the Truth. And it is cried unto them: This is the Garden. Ye inherit it for what ye used to do.

(28) Is it not an indication to those who inherit the land after its people (who thus reaped the consequence of evil-doing) that, if We will, We can smite them for their sins and print upon their hearts so that they hear not?

(29) Such were the townships. We relate some tidings of them unto thee (Muhammad). Their messengers verily came unto them with clear proofs (of Allah's Sovereignty), but they could not believe because they had before denied. Thus doth Allah print upon the hearts of disbelievers (that they hear not).

(30) Already have We urged unto hell many of the jinn and humankind, having hearts wherewith they understand not, and having eyes wherewith they see not, and having ears wherewith they hear not. These are as the cattle - nay, but they are worse! These are the neglectful.