The word(s) "heart" appears 213 time(s) in 195 verse(s) in Quran in Abdullah Yusuf Ali translation.

(181) He knows what is in the heavens and on earth; and He knows what ye conceal and what ye reveal: yea, Allah knows well the (secrets) of (all) hearts.

(182) No kind of calamity can occur, except by the leave of Allah: and if any one believes in Allah, (Allah) guides his heart (aright): for Allah knows all things.

(183) If ye two turn in repentance to Him, your hearts are indeed so inclined; But if ye back up each other against him, truly Allah is his Protector, and Gabriel, and (every) righteous one among those who believe,- and furthermore, the angels - will back (him) up.

(184) And whether ye hide your word or publish it, He certainly has (full) knowledge, of the secrets of (all) hearts.

(185) And We should certainly then cut off the artery of his heart:

(186) But keep in remembrance the name of thy Lord and devote thyself to Him whole-heartedly.

(187) And We have set none but angels as Guardians of the Fire; and We have fixed their number only as a trial for Unbelievers,- in order that the People of the Book may arrive at certainty, and the Believers may increase in Faith,- and that no doubts may be left for the People of the Book and the Believers, and that those in whose hearts is a disease and the Unbelievers may say, "What symbol doth Allah intend by this?" Thus doth Allah leave to stray whom He pleaseth, and guide whom He pleaseth: and none can know the forces of thy Lord, except He and this is no other than a warning to mankind.

(188) "Eat ye and drink ye to your heart's content: for that ye worked (Righteousness).

(189) Verily for the Righteous there will be a fulfilment of (the heart's) desires;

(190) hearts that Day will be in agitation;