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

(371) And obey not the disbelievers and the hypocrites, and harm them not (in revenge for their harming you till you are ordered). And put your trust in Allah, and Sufficient is Allah as a Wakil (Trustee, or Disposer of affairs). [Tafsir Al-Qurtubi]

(372) O Prophet (Muhammad صلى الله عليه وسلم)! Verily, We have made lawful to you your wives, to whom you have paid their Mahr (bridal-money given by the husband to his wife at the time of marriage), and those (slaves) whom your right hand possesses - whom Allah has given to you, and the daughters of your 'Amm (paternal uncles) and the daughters of your 'Ammat (paternal aunts) and the daughters of your Khal (maternal uncles) and the daughters of your Khalat (maternal aunts) who migrated (from Makkah) with you, and a believing woman if she offers herself to the Prophet, and the Prophet wishes to marry her - a privilege for you only, not for the (rest of) the believers. Indeed We know what We have enjoined upon them about their wives and those (slaves) whom their right hands possess, in order that there should be no difficulty on you. And Allah is Ever Oft-Forgiving, Most Merciful.

(373) O Prophet! Tell your wives and your daughters and the women of the believers to draw their cloaks (veils) all over their bodies (i.e. screen themselves completely except the eyes or one eye to see the way). That will be better, that they should be known (as free respectable women) so as not to be annoyed. And Allah is Ever Oft-Forgiving, Most Merciful.

(374) Verily, Allah has cursed the disbelievers, and has prepared for them a flaming Fire (Hell).

(375) So that Allah will punish the hypocrites, men and women, and the men and women who are Al-Mushrikun (polytheists, idolaters, pagans, disbelievers, in the Oneness of Allah, and His Messenger Muhammad صلى الله عليه وسلم). And Allah will pardon (accept the repentance of) the true believers of the Islamic Monotheism, men and women. And Allah is Ever Oft-Forgiving, Most Merciful.

(376) Like this We requited them because they were ungrateful disbelievers. And never do We requite in such a way except those who are ungrateful (disbelievers).

(377) And indeed Iblis (Satan) did prove true his thought about them: and they followed him, all except a group of true believers (in the Oneness of Allah).

(378) And those who disbelieve say: "We believe not in this Qur'an nor in that which was before it." But if you could see when the Zalimun (polytheists and wrong-doers) will be made to stand before their Lord, how they will cast the (blaming) word one to another! Those who were deemed weak will say to those who were arrogant: "Had it not been for you, we should certainly have been believers!"

(379) And those who were arrogant will say to those who were deemed weak: "Did we keep you back from guidance after it had come to you? Nay, but you were Mujrimun (polytheists, sinners, disbelievers, criminals)."

(380) They (the angels) will say: "Glorified be You! You are our Wali (Lord) instead of them. Nay, but they used to worship the jinn; most of them were believers in them."