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

(191) A believer, a man from among the people of Pharaoh, who had concealed his faith, said: "Will ye slay a man because he says, 'My Lord is Allah'?- when he has indeed come to you with Clear (Signs) from your Lord? and if he be a liar, on him is (the sin of) his lie: but, if he is telling the Truth, then will fall on you something of the (calamity) of which he warns you: Truly Allah guides not one who transgresses and lies!

(192) "(Such) as dispute about the Signs of Allah, without any authority that hath reached them, grievous and odious (is such conduct) in the sight of Allah and of the believers. Thus doth Allah, seal up every heart - of arrogant and obstinate Transgressors."

(193) "He that works evil will not be requited but by the like thereof: and he that works a righteous deed - whether man or woman - and is a believer- such will enter the Garden (of Bliss): Therein will they have abundance without measure.

(194) "In derogation of Allah?" They will reply: "They have left us in the lurch: Nay, we invoked not, of old, anything (that had real existence)." Thus does Allah leave the Unbelievers to stray.

(195) The Unbelievers say: "Listen not to this Qur'an, but talk at random in the midst of its (reading), that ye may gain the upper hand!"

(196) But We will certainly give the Unbelievers a taste of a severe Penalty, and We will requite them for the worst of their deeds.

(197) And the Unbelievers will say: "Our Lord! Show us those, among Jinns and men, who misled us: We shall crush them beneath our feet, so that they become the vilest (before all)."

(198) But is the (Unbelievers) are arrogant, (no matter): for in the presence of thy Lord are those who celebrate His praises by night and by day. And they never flag (nor feel themselves above it).

(199) When we give him a taste of some Mercy from Ourselves, after some adversity has touched him, he is sure to say, "This is due to my (merit): I think not that the Hour (of Judgment) will (ever) be established; but if I am brought back to my Lord, I have (much) good (stored) in His sight!" But We will show the Unbelievers the truth of all that they did, and We shall give them the taste of a severe Penalty.

(200) And He listens to those who believe and do deeds of righteousness, and gives them increase of His Bounty: but for the Unbelievers their is a terrible Penalty.