The word(s) "but" appears 1287 time(s) in 1137 verse(s) in Quran in Mohsin Khan translation.

(571) And he whom Allah guides, he is led aright; but he whom He sends astray, for such you will find no Auliya' (helpers and protectors), besides Him, and We shall gather them together on the Day of Resurrection on their faces, blind, dumb and deaf; their abode will be Hell; whenever it abates, We shall increase for them the fierceness of the Fire.

(572) See they not that Allah, Who created the heavens and the earth, is Able to create the like of them. And He has decreed for them an appointed term, whereof there is no doubt. but the Zalimun (polytheists and wrong-doers) refuse (the truth - the Message of Islamic Monotheism, and accept nothing) but disbelief.

(573) [Musa (Moses)] said: "Verily, you know that these signs have been sent down by none but the Lord of the heavens and the earth (as clear evidence i.e. proofs of Allah's Oneness and His Omnipotence.). And I think you are, indeed, O Fir'aun (Pharaoh) doomed to destruction (away from all good)!"

(574) So he resolved to turn them out of the land (of Egypt). but We drowned him and all who were with him.

(575) And with truth We have sent it down (i.e. the Qur'an), and with truth it has descended. And We have sent you (O Muhammad صلى الله عليه و سلم) as nothing but a bearer of glad tidings (of Paradise for those who follow your Message of Islamic Monotheism), and a warner (of Hell-fire for those who refuse to follow your Message of Islamic Monotheism) .

(576) Say (O Muhammad صلى الله عليه و سلم): "Invoke Allah or invoke the Most Gracious (Allah), by whatever name you invoke Him (it is the same), for to Him belong the Best Names. And offer your Salat (prayer) neither aloud nor in a low voice, but follow a way between.

(577) No knowledge have they of such a thing, nor had their fathers. Mighty is the word that comes out of their mouths [i.e. He begot sons and daughters]. They utter nothing but a lie .

(578) And you might have seen the sun, when it rose, declining to the right from their Cave, and when it set, turning away from them to the left, while they lay in the midst of the Cave. That is (one) of the Ayat (proofs, evidence, signs) of Allah. He whom Allah guides, he is the rightly guided; but he whom He sends astray, for him you will find no Wali (guiding friend) to lead him (to the right Path).

(579) (Some) say they were three, the dog being the fourth among them; and (others) say they were five, the dog being the sixth, - guessing at the unseen; (yet others) say they were seven, and the dog being the eighth. Say (O Muhammad صلى الله عليه وسلم): "My Lord knows best their number; none knows them but a few." So debate not (about their number) except with the clear proof (which We have revealed to you). And consult not any of them (people of the Scripture - Jews and Christians) about (the affair of) the people of the Cave.

(580) "but as for my part, (I believe) that He is Allah, my Lord, and none shall I associate as partner with my Lord.