The word(s) "believer" appears 350 time(s) in 314 verse(s) in Quran in Muhammad Pickthal translation.

(291) Fain would they put out the light of Allah with their mouths, but Allah will perfect His light however much the disbelievers are averse.

(292) And (He will give you) another (blessing) which ye love: help from Allah and present victory. Give good tidings (O Muhammad) to believers.

(293) They say: Surely, if we return to Al-Madinah the mightier will soon drive out the weaker; when might belongeth to Allah and to His messenger and to the believers; but the hypocrites know not.

(294) He it is Who created you, but one of you is a disbeliever and one of you is a believer, and Allah is Seer of what ye do.

(295) Allah! There is no Allah save Him. In Allah, therefore, let believers put their trust.

(296) If ye twain turn unto Allah repentant, (ye have cause to do so) for your hearts desired (the ban); and if ye aid one another against him (Muhammad) then lo! Allah, even He, is his Protecting Friend, and Gabriel and the righteous among the believers; and furthermore the angels are his helpers.

(297) O Prophet! Strive against the disbelievers and the hypocrites, and be stern with them. Hell will be their home, a hapless journey's end.

(298) Or who is he that will be an army unto you to help you instead of the Beneficent? The disbelievers are in naught but illusion.

(299) Say (O Muhammad): Have ye thought: Whether Allah causeth me (Muhammad) and those with me to perish or hath mercy on us, still, who will protect the disbelievers from a painful doom?

(300) And lo! it is indeed an anguish for the disbelievers.