The word(s) "believer" appears 309 time(s) in 259 verse(s) in Quran in Abdullah Yusuf Ali translation.

(101) The parable of the Garden which the righteous are promised!- beneath it flow rivers: perpetual is the enjoyment thereof and the shade therein: such is the end of the Righteous; and the end of Unbelievers in the Fire.

(102) Those before them did (also) devise plots; but in all things the master-planning is Allah's He knoweth the doings of every soul: and soon will the Unbelievers know who gets home in the end.

(103) The Unbelievers say: "No messenger art thou." Say: "Enough for a witness between me and you is Allah, and such as have knowledge of the Book."

(104) Of Allah, to Whom do belong all things in the heavens and on earth! But alas for the Unbelievers for a terrible penalty (their Unfaith will bring them)!-

(105) And the Unbelievers said to their messengers: "Be sure we shall drive you out of our land, or ye shall return to our religion." But their Lord inspired (this Message) to them: "Verily We shall cause the wrong-doers to perish!

(106) "O our Lord! cover (us) with Thy Forgiveness - me, my parents, and (all) believers, on the Day that the Reckoning will be established!

(107) Strain not thine eyes. (Wistfully) at what We have bestowed on certain classes of them, nor grieve over them: but lower thy wing (in gentleness) to the believers.

(108) Then, on the Day of Judgment, He will cover them with shame, and say: "Where are My 'partners' concerning whom ye used to dispute (with the godly)?" Those endued with knowledge will say: "This Day, indeed, are the Unbelievers covered with shame and misery,-

(109) One Day We shall raise from all Peoples a Witness: then will no excuse be accepted from Unbelievers, nor will they receive any favours.

(110) Verily this Qur'an doth guide to that which is most right (or stable), and giveth the Glad Tidings to the believers who work deeds of righteousness, that they shall have a magnificent reward;