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

(71) Verily the transposing (of a prohibited month) is an addition to Unbelief: the Unbelievers are led to wrong thereby: for they make it lawful one year, and forbidden another year, in order to adjust the number of months forbidden by Allah and make such forbidden ones lawful. The evil of their course seems pleasing to them. But Allah guideth not those who reject Faith.

(72) If ye help not (your leader), (it is no matter): for Allah did indeed help him, when the Unbelievers drove him out: he had no more than one companion; they two were in the cave, and he said to his companion, "Have no fear, for Allah is with us": then Allah sent down His peace upon him, and strengthened him with forces which ye saw not, and humbled to the depths the word of the Unbelievers. But the word of Allah is exalted to the heights: for Allah is Exalted in might, Wise.

(73) Among them is (many) a man who says: "Grant me exemption and draw me not into trial." Have they not fallen into trial already? and indeed Hell surrounds the Unbelievers (on all sides).

(74) Say: "Nothing will happen to us except what Allah has decreed for us: He is our protector": and on Allah let the believers put their trust.

(75) Among them are men who molest the Prophet and say, "He is (all) ear." Say, "He listens to what is best for you: he believes in Allah, has faith in the believers, and is a Mercy to those of you who believe." But those who molest the Messenger will have a grievous penalty.

(76) To you they swear by Allah. In order to please you: But it is more fitting that they should please Allah and His Messenger, if they are believers.

(77) The believers, men and women, are protectors one of another: they enjoin what is just, and forbid what is evil: they observe regular prayers, practise regular charity, and obey Allah and His Messenger. On them will Allah pour His mercy: for Allah is Exalted in power, Wise.

(78) Allah hath promised to believers, men and women, gardens under which rivers flow, to dwell therein, and beautiful mansions in gardens of everlasting bliss. But the greatest bliss is the good pleasure of Allah: that is the supreme felicity.

(79) O Prophet! strive hard against the unbelievers and the Hypocrites, and be firm against them. Their abode is Hell,- an evil refuge indeed.

(80) Those who slander such of the believers as give themselves freely to (deeds of) charity, as well as such as can find nothing to give except the fruits of their labour,- and throw ridicule on them,- Allah will throw back their ridicule on them: and they shall have a grievous penalty.