The word(s) "mercy" appears 151 time(s) in 147 verse(s) in Quran in Muhammad Habib Shakir translation.

(41) And Musa chose out of his people seventy men for Our appointment; so when the earthquake overtook them, he said: My Lord! if Thou hadst pleased, Thou hadst destroyed them before and myself (too); wilt Thou destroy us for what the fools among us have done? It is naught but Thy trial, Thou makest err with it whom Thou pleasest and guidest whom Thou pleasest: Thou art our Guardian, therefore forgive us and have mercy on us, and Thou art the best of the forgivers.

(42) And ordain for us good in this world's life and in the hereafter, for surely we turn to Thee. He said: (As for) My chastisement, I will afflict with it whom I please, and My mercy encompasses all things; so I will ordain it (specially) for those who guard (against evil) and pay the poor-rate, and those who believe in Our communications.

(43) And when you bring them not a revelation they say: Why do you not forge it? Say: I only follow what is revealed to me from my Lord; these are clear proofs from your Lord and a guidance and a mercy for a people who believe.

(44) And when the Quran is recited, then listen to it and remain silent, that mercy may be shown to you.

(45) Their Lord gives them good news of mercy from Himself and (His) good pleasure and gardens, wherein lasting blessings shall be theirs;

(46) And there are some of them who molest the Prophet and say: He is one who believes every thing that he hears; say: A hearer of good for you (who) believes in Allah and believes the faithful and a mercy for those of you who believe; and (as for) those who molest the Apostle of Allah, they shall have a painful punishment.

(47) And (as for) the believing men and the believing women, they are guardians of each other; they enjoin good and forbid evil and keep up prayer and pay the poor-rate, and obey Allah and His Apostle; (as for) these, Allah will show mercy to them; surely Allah is Mighty, Wise.

(48) And of the dwellers of the desert are those who believe in Allah and the latter day and take what they spend to be (means of) the nearness of Allah and the Apostle's prayers; surely it shall be means of nearness for them; Allah will make them enter into His mercy; surely Allah is Forgiving, Merciful.

(49) Do they not know that Allah accepts repentance from His servants and takes the alms, and that Allah is the Oft-returning (to mercy), the Merciful?

(50) And to the three who were left behind, until the earth became strait to them notwithstanding its spaciousness and their souls were also straitened to them; and they knew it for certain that there was no refuge from Allah but in Him; then He turned to them (mercifully) that they might turn (to Him); surely Allah is the Oft-returning (to mercy), the Merciful.