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

(251) And when he brought them the Truth from Our presence, they said: Slay the sons of those who believe with him, and spare their women. But the plot of disbelievers is in naught but error.

(252) Whoso doeth an ill-deed, he will be repaid the like thereof, while whoso doeth right, whether male or female, and is a believer, (all) such will enter the Garden, where they will be nourished without stint.

(253) They say: Came not your messengers unto you with clear proofs? They say: Yea, verily. They say: Then do ye pray, although the prayer of disbelievers is in vain.

(254) Beside Allah? They say: They have failed us; but we used not to pray to anything before. Thus doth Allah send astray the disbelievers (in His guidance).

(255) But their faith could not avail them when they saw Our doom. This is Allah's law which hath ever taken course for His bondmen. And then the disbelievers will be ruined.

(256) Who give not the poor-due, and who are disbelievers in the Hereafter.

(257) When their messengers came unto them from before them and behind them, saying: Worship none but Allah! they said: If our Lord had willed, He surely would have sent down angels (unto us), so lo! we are disbelievers in that wherewith ye have been sent.

(258) And accepteth those who do good works, and giveth increase unto them of His bounty. And as for disbelievers, theirs will be an awful doom.

(259) (And the warner) said: What! Even though I bring you better guidance than that ye found your fathers following? They answered: Lo! in what ye bring we are disbelievers.

(260) And now that the Truth hath come unto them they say: This is mere magic, and lo! we are disbelievers therein.