The word(s) "mercy" appears 164 time(s) in 155 verse(s) in Quran in Muhammad Pickthal translation.

(41) And when thou bringest not a verse for them they say: Why hast thou not chosen it? Say: I follow only that which is inspired in me from my Lord. This (Qur'an) is insight from your Lord, and a guidance and a mercy for a people that believe.

(42) And when the Qur'an is recited, give ear to it and pay heed, that ye may obtain mercy.

(43) Their Lord giveth them good tidings of mercy from Him, and acceptance, and Gardens where enduring pleasure will be theirs;

(44) And of them are those who vex the Prophet and say: He is only a hearer. Say: A hearer of good for you, who believeth in Allah and is true to the believers, and a mercy for such of you as believe. Those who vex the messenger of Allah, for them there is a painful doom.

(45) And the believers, men and women, are protecting friends one of another; they enjoin the right and forbid the wrong, and they establish worship and they pay the poor-due, and they obey Allah and His messenger. As for these, Allah will have mercy on them. Lo! Allah is Mighty, Wise.

(46) And of the wandering Arabs there is he who believeth in Allah and the Last Day, and taketh that which he expendeth and also the prayers of the messenger as acceptable offerings in the sight of Allah. Lo! verily it is an acceptable offering for them. Allah will bring them into His mercy. Lo! Allah is Forgiving, Merciful.

(47) Allah hath turned in mercy to the Prophet, and to the Muhajirin and the Ansar who followed him in the hour of hardship. After the hearts of a party of them had almost swerved aside, then turned He unto them in mercy. Lo! He is Full of Pity, Merciful for them.

(48) And to the three also (did He turn in mercy) who were left behind, when the earth, vast as it is, was straitened for them, and their own souls were straitened for them till they bethought them that there is no refuge from Allah save toward Him. Then turned He unto them in mercy that they (too) might turn (repentant unto Him). Lo! Allah! He is the Relenting, the Merciful.

(49) And when We cause mankind to taste of mercy after some adversity which had afflicted them, behold! they have some plot against Our revelations. Say: Allah is more swift in plotting. Lo! Our messengers write down that which ye plot.

(50) O mankind! There hath come unto you an exhortation from your Lord, a balm for that which is in the breasts, a guidance and a mercy for believers.