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

(241) To warn whosoever liveth, and that the word may be fulfilled against the disbelievers.

(242) They answer: Nay, but ye (yourselves) were not believers.

(243) And they marvel that a warner from among themselves hath come unto them, and the disbelievers say: This is a wizard, a charlatan.

(244) Saving Iblis; he was scornful and became one of the disbelievers.

(245) Is he who payeth adoration in the watches of the night, prostrate and standing, bewaring of the Hereafter and hoping for the mercy of his Lord, (to be accounted equal with a disbeliever)? Say (unto them, O Muhammad): Are those who know equal with those who know not? But only men of understanding will pay heed.

(246) And who doth greater wrong than he who telleth a lie against Allah, and denieth the truth when it reacheth him? Will not the home of disbelievers be in hell?

(247) (But now the answer will be): Nay, for My revelations came unto thee, but thou didst deny them and wast scornful and wast among the disbelievers.

(248) Say (O Muhammad, to the disbelievers): Do ye bid me serve other than Allah? O ye fools!

(249) And those who disbelieve are driven unto hell in troops till, when they reach it and the gates thereof are opened, and the warders thereof say unto them: Came there not unto you messengers of your own, reciting unto you the revelations of your Lord and warning you of the meeting of this your Day? they say: Yea, verily. But the word of doom of disbelievers is fulfilled.

(250) Therefor (O believers) pray unto Allah, making religion pure for Him (only), however much the disbelievers be averse -