The word(s) "mercy" appears 168 time(s) in 158 verse(s) in Quran in Mohsin Khan translation.

(41) The believers, men and women, are Auliya' (helpers, supporters, friends, protectors) of one another; they enjoin (on the people) Al-Ma'ruf (i.e. Islamic Monotheism and all that Islam orders one to do), and forbid (people) from Al-Munkar (i.e. polytheism and disbelief of all kinds, and all that Islam has forbidden); they perform As-Salat (Iqamat-as-Salat), and give the Zakat, and obey Allah and His Messenger. Allah will have His mercy on them. Surely Allah is All-Mighty, All-Wise.

(42) And of the bedouins there are some who believe in Allah and the Last Day, and look upon what they spend in Allah's Cause as means of nearness to Allah, and a cause of receiving the Messenger's invocations. Indeed these (spendings in Allah's Cause) are a means of nearness for them. Allah will admit them to His mercy. Certainly Allah is Oft-Forgiving, Most Merciful.

(43) And when We let mankind taste mercy after some adversity has afflicted them, behold! they take to plotting against Our Ayat (proofs, evidence, verses, lessons, signs, revelations, etc.)! Say: "Allah is more Swift in planning!" Certainly, Our Messengers (angels) record all of that which you plot.

(44) O mankind! There has come to you a good advice from your Lord (i.e. the Qur'an, enjoining all that is good and forbidding all that is evil), and a healing for that (disease of ignorance, doubt, hypocrisy and differences) which is in your breasts, - a guidance and a mercy (explaining lawful and unlawful things) for the believers.

(45) Say: "In the Bounty of Allah, and in His mercy (i.e. Islam and the Qur'an); - therein let them rejoice." That is better than what (the wealth) they amass.

(46) "And save us by Your mercy from the disbelieving folk."

(47) And if We give man a taste of mercy from Us, and then withdraw it from him, verily! he is despairing, ungrateful.

(48) Can they (Muslims) who rely on a clear proof (the Qur'an) from their Lord, and whom a witness [Jibril (Gabriel عليه السلام)] from Him recites (follows) it (can they be equal with the disbelievers); and before it, came the Book of Musa (Moses), a guidance and a mercy, they believe therein, but those of the sects (Jews, Christians and all the other non-Muslim nations) that reject it (the Qur'an), the Fire will be their promised meeting-place. So be not in doubt about it (i.e. those who denied Prophet Muhammad صلى الله عليه و سلم and also denied all that which he brought from Allah. Surely, they will enter Hell). Verily, it is the truth from your Lord, but most of the mankind believe not.

(49) He said: "O my people! Tell me, if I have a clear proof from my Lord, and a mercy (Prophethood) has come to me from Him, but that (mercy) has been obscured from your sight. Shall we compel you to accept it (Islamic Monotheism) when you have a strong hatred for it?

(50) (The son) replied: "I will betake myself to some mountain; it will save me from the water." Nuh (Noah) said: "This day there is no saviour from the Decree of Allah except him on whom He has mercy." And waves came in between them, so he (the son) was among the drowned.