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

(21) O ye who believe! Observe your duty to Allah, and give up what remaineth (due to you) from usury, if ye are (in truth) believers.

(22) The messenger believeth in that which hath been revealed unto him from his Lord and (so do) believers. Each one believeth in Allah and His angels and His scriptures and His messengers - We make no distinction between any of His messengers - and they say: We hear, and we obey. (Grant us) Thy forgiveness, our Lord. Unto Thee is the journeying.

(23) Let not the believers take disbelievers for their friends in preference to believers. Whoso doeth that hath no connection with Allah unless (it be) that ye but guard yourselves against them, taking (as it were) security. Allah biddeth you beware (only) of Himself. Unto Allah is the journeying.

(24) Say: Obey Allah and the messenger. But if they turn away, lo! Allah loveth not the disbelievers (in His guidance).

(25) And will make him a messenger unto the Children of Israel, (saying): Lo! I come unto you with a sign from your Lord. Lo! I fashion for you out of clay the likeness of a bird, and I breathe into it and it is a bird, by Allah's leave. I heal him who was born blind, and the leper, and I raise the dead, by Allah's leave. And I announce unto you what ye eat and what ye store up in your houses. Lo! herein verily is a portent for you, if ye are to be believers.

(26) And they (the disbelievers) schemed, and Allah schemed (against them): and Allah is the best of schemers.

(27) Lo! those of mankind who have the best claim to Abraham are those who followed him, and this Prophet and those who believe (with him); and Allah is the Protecting Guardian of the believers.

(28) Say: O People of the Scripture! Why drive ye back believers from the way of Allah, seeking to make it crooked, when ye are witnesses (to Allah's guidance)? Allah is not unaware of what ye do.

(29) O ye who believe! If ye obey a party of those who have received the Scripture they will make you disbelievers after your belief.

(30) Ye are the best community that hath been raised up for mankind. Ye enjoin right conduct and forbid indecency; and ye believe in Allah. And if the People of the Scripture had believed it had been better for them. Some of them are believers; but most of them are evil-livers.