The word(s) "believer" appears 651 time(s) in 556 verse(s) in Quran in Mohsin Khan translation.

(1) This is the Book (the Qur'an), whereof there is no doubt, a guidance to those who are Al-Muttaqun [the pious believers of Islamic Monotheism who fear Allah much (abstain from all kinds of sins and evil deeds which He has forbidden) and love Allah much (perform all kinds of good deeds which He has ordained)].

(2) Or like a rainstorm from the sky, wherein is darkness, thunder, and lightning. They thrust their fingers in their ears to keep out the stunning thunder-clap for fear of death. But Allah ever encompasses the disbelievers (i.e. Allah will gather them all together).

(3) But if you do it not, and you can never do it, then fear the Fire (Hell) whose fuel is men and stones, prepared for the disbelievers.

(4) And (remember) when We said to the angels: "Prostrate yourselves before Adam.". And they prostrated except Iblis (Satan), he refused and was proud and was one of the disbelievers (disobedient to Allah).

(5) And seek help in patience and As-Salat (the prayer) and truly it is extremely heavy and hard except for Al-Khashi'un [i.e. the true believers in Allah - those who obey Allah with full submission, fear much from His Punishment, and believe in His Promise (Paradise) and in His Warnings (Hell)].

(6) Do you (faithful believers) covet that they will believe in your religion inspite of the fact that a party of them (Jewish rabbis) used to hear the Word of Allah [the Taurat (Torah)], then they used to change it knowingly after they understood it?

(7) And when there came to them (the Jews), a Book (this Qur'an) from Allah confirming what is with them [the Taurat (Torah) and the Injeel (Gospel)], although aforetime they had invoked Allah (for coming of Muhammad صلى الله عليه وسلم) in order to gain victory over those who disbelieved, then when there came to them that which they had recognised, they disbelieved in it. So let the Curse of Allah be on the disbelievers.

(8) How bad is that for which they have sold their ownselves, that they should disbelieve in that which Allah has revealed (the Qur'an), grudging that Allah should reveal of His Grace unto whom He wills of His slaves. So they have drawn on themselves wrath upon wrath. And for the disbelievers, there is disgracing torment.

(9) And when it is said to them (the Jews), "Believe in what Allah has sent down," they say, "We believe in what was sent down to us." And they disbelieve in that which came after it, while it is the truth confirming what is with them. Say (O Muhammad صلى الله عليه وسلم to them): "Why then have you killed the Prophets of Allah aforetime, if you indeed have been believers?"

(10) And (remember) when We took your covenant and We raised above you the Mount (saying), "Hold firmly to what We have given you and hear (Our Word)." They said, "We have heard and disobeyed." And their hearts absorbed (the worship of) the calf because of their disbelief. Say: "Worst indeed is that which your faith enjoins on you if you are believers."