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

(321) And they belied them (those Ayat) wrongfully and arrogantly, though their ownselves were convinced thereof [i.e. those (Ayat ) are from Allah, and Musa (Moses) is the Messenger of Allah in truth, but they disliked to obey Musa (Moses), and hated to believe in his Message of Monotheism]. So see what was the end of the Mufsidun (disbelievers, disobedient to Allah, evil-doers and liars.).

(322) "Be you not exalted against me, but come to me as Muslims (true believers who submit to Allah with full submission).' "

(323) And indeed We sent to Thamud their brother Salih, saying: "Worship Allah (Alone and none else). Then look! They became two parties (believers and disbelievers) quarreling with each other."

(324) And they (the disbelievers in the Oneness of Allah) say: "When (will) this promise (be fulfilled), if you are truthful?"

(325) And truly, it (this Qur'an) is a guide and a mercy for the believers.

(326) Verily, you cannot make the dead to hear nor can you make the deaf to hear the call (i.e. benefit them and similarly the disbelievers), when they flee, turning their backs.

(327) And the heart of the mother of Musa (Moses) became empty [from every thought, except the thought of Musa (Moses)]. She was very near to disclose his (case, i.e. the child is her son), had We not strengthened her heart (with Faith), so that she might remain as one of the believers.

(328) He said: "My Lord! For that with which You have favoured me, I will never more be a helper of the Mujrimun (criminals, disbelievers, polytheists, sinners)!"

(329) Then there came to him one of the two women, walking shyly. She said: "Verily, my father calls you that he may reward you for having watered (our flocks) for us." So when he came to him and narrated the story, he said: "Fear you not. You have escaped from the people who are Zalimun (polytheists, disbelievers, and wrong-doers)."

(330) Musa (Moses) said: "My Lord knows best him who came with guidance from Him, and whose will be the happy end in the Hereafter. Verily, the Zalimun (wrong-doers, polytheists and disbelievers in the Oneness of Allah) will not be successful."