The word(s) "believer" appears 297 time(s) in 275 verse(s) in Quran in Muhammad Habib Shakir translation.

(251) O you who believe! when believing women come to you flying, then examine them; Allah knows best their faith; then if you find them to be believing women, do not send them back to the unbelievers, neither are these (women) lawful for them, nor are those (men) lawful for them, and give them what they have spent; and no blame attaches to you in marrying them when you give them their dowries; and hold not to the ties of marriage of unbelieving women, and ask for what you have spent, and let them ask for what they have spent. That is Allah's judgment; He judges between you, and Allah is Knowing, Wise.

(252) And if anything (out of the dowries) of your wives has passed away from you to the unbelievers, then your turn comes, give to those whose wives have gone away the like of what they have spent, and be careful of (your duty to) Allah in Whom you believe.

(253) O you who believe! do not make friends with a people with whom Allah is wroth; indeed they despair of the hereafter as the unbelievers despair of those in tombs.

(254) They desire to put out the light of Allah with their mouths but Allah will perfect His light, though the unbelievers may be averse.

(255) And yet another (blessing) that you love: help from Allah and a victory near at hand; and give good news to the believers.

(256) They say: If we return to Medina, the mighty will surely drive out the meaner therefrom; and to Allah belongs the might and to His Apostle and to the believers, but the hypocrites do not know.

(257) He it is Who created you, but one of you is an unbeliever and another of you is a believer; and Allah sees what you do.

(258) Allah, there is no god but He; and upon Allah, then, let the believers rely.

(259) If you both turn to Allah, then indeed your hearts are already inclined (to this); and if you back up each other against him, then surely Allah it is Who is his Guardian, and Jibreel and -the believers that do good, and the angels after that are the aiders.

(260) O Prophet! strive hard against the unbelievers and the hypocrites, and be hard against them; and their abode is hell; and evil is the resort.