The word(s) "believer" appears 651 time(s) in 556 verse(s) in Quran in Mohsin Khan translation.

(271) Verily, in this (the Qur'an) there is a plain Message for people who worship Allah (i.e. the true, real believers of Islamic Monotheism who act practically on the Qur'an and the Sunnah - legal ways of the Prophet صلى الله عليه وسلم).

(272) But if they (disbelievers, idolaters, Jews, Christians, polytheists) turn away (from Islamic Monotheism) say (to them O Muhammad صلى الله عليه وسلم): "I give you a notice (of war as) to be known to us all alike. And I know not whether that which you are promised (i.e. the torment or the Day of Resurrection) is near or far. "

(273) These two opponents (believers and disbelievers) dispute with each other about their Lord: then as for those who disbelieved, garments of fire will be cut out for them, boiling water will be poured down over their heads.

(274) And for every nation We have appointed religious ceremonies, that they may mention the Name of Allah over the beast of cattle that He has given them for food. And your Ilah (God) is One Ilah (God - Allah), so you must submit to Him Alone (in Islam). And (O Muhammad صلى الله عليه وسلم) give glad tidings to the Mukhbitun (those who obey Allah with humility and are humble from among the true believers of Islamic Monotheism),

(275) Permission to fight (against disbelievers) is given to those (believers) who are fought against, because they have been wronged; and surely, Allah is Able to give them (believers) victory -

(276) And the dwellers of Madyan (Midian); and belied was Musa (Moses). But I granted respite to the disbelievers for a while, then I seized them, and how (terrible) was My punishment (against their wrong-doing)!

(277) That He (Allah) may make what is thrown in by Shaitan (Satan) a trial for those in whose hearts is a disease (of hypocrisy and disbelief) and whose hearts are hardened. And certainly, the Zalimun (polytheists and wrong-doers) are in an opposition far-off (from the truth against Allah's Messenger and the believers).

(278) And they worship besides Allah others for which He has sent down no authority, and of which they have no knowledge; and for the Zalimun (wrong-doers, polytheists and disbelievers in the Oneness of Allah) there is no helper.

(279) And when Our Clear Verses are recited to them, you will notice a denial on the faces of the disbelievers! They are nearly ready to attack with violence those who recite Our Verses to them. Say: "Shall I tell you of something worse than that? The Fire (of Hell) which Allah has promised to those who disbelieved, and worst indeed is that destination!"

(280) Successful indeed are the believers.