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

(161) The Prophet is closer to the believers than their own selves, and his wives are their mothers. Blood-relations among each other have closer personal ties, in the Decree of Allah. Than (the Brotherhood of) believers and Muhajirs: nevertheless do ye what is just to your closest friends: such is the writing in the Decree (of Allah).

(162) That (Allah) may question the (custodians) of Truth concerning the Truth they (were charged with): And He has prepared for the Unbelievers a grievous Penalty.

(163) In that situation were the believers tried: they were shaken as by a tremendous shaking.

(164) When the believers saw the Confederate forces, they said: "This is what Allah and his Messenger had promised us, and Allah and His Messenger told us what was true." And it only added to their faith and their zeal in obedience.

(165) Among the believers are men who have been true to their covenant with Allah: of them some have completed their vow (to the extreme), and some (still) wait: but they have never changed (their determination) in the least:

(166) And Allah turned back the Unbelievers for (all) their fury: no advantage did they gain; and enough is Allah for the believers in their fight. And Allah is full of Strength, able to enforce His Will.

(167) It is not fitting for a believer, man or woman, when a matter has been decided by Allah and His Messenger to have any option about their decision: if any one disobeys Allah and His Messenger, he is indeed on a clearly wrong Path.

(168) Behold! Thou didst say to one who had received the grace of Allah and thy favour: "Retain thou (in wedlock) thy wife, and fear Allah." But thou didst hide in thy heart that which Allah was about to make manifest: thou didst fear the people, but it is more fitting that thou shouldst fear Allah. Then when Zaid had dissolved (his marriage) with her, with the necessary (formality), We joined her in marriage to thee: in order that (in future) there may be no difficulty to the believers in (the matter of) marriage with the wives of their adopted sons, when the latter have dissolved with the necessary (formality) (their marriage) with them. And Allah's command must be fulfilled.

(169) He it is Who sends blessings on you, as do His angels, that He may bring you out from the depths of Darkness into Light: and He is Full of Mercy to the believers.

(170) Then give the Glad Tidings to the believers, that they shall have from Allah a very great Bounty.