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

(631) And We did not send any Messenger before you (O Muhammad صلى الله عليه وسلم) but We revealed to him (saying): La ilaha illa Ana [none has the right to be worshipped but I (Allah)], so worship Me (Alone and none else)."

(632) And they say: "The Most Gracious (Allah) has begotten a son (or children)." Glory to Him! They [whom they call children of Allah i.e. the angels, 'Îsa (Jesus) - son of Maryam (Mary), 'Uzair (Ezra)], are but honoured slaves.

(633) Indeed, (many) Messengers were mocked before you (O Muhammad صلى الله عليه وسلم), but the scoffers were surrounded by that, whereat they used to mock.

(634) Say: "Who can guard and protect you in the night or in the day from the (punishment of the) Most Gracious (Allah)?" Nay, but they turn away from the remembrance of their Lord.

(635) Say (O Muhammad صلى الله عليه وسلم): "I warn you only by the revelation (from Allah and not by the opinion of the religious scholars and others). but the deaf (who follow the religious scholars and others blindly) will not hear the call, (even) when they are warned [i.e. one should follow only the Qur'an and the Sunnah (legal ways, orders, acts of worship, and the statements of Prophet Muhammad صلى الله عليه وسلم, as the companions of the Prophet صلى الله عليه وسلم did)] .

(636) And they wanted to harm him, but We made them the worst losers.

(637) And (remember) Dhun-Nun (Jonah), when he went off in anger, and imagined that We shall not punish him (i.e. the calamities which had befallen him)! but he cried through the darkness (saying): La ilaha illa Anta [none has the right to be worshipped but You (O, Allah)], Glorified (and Exalted) be You [above all that (evil) they associate with You]! Truly, I have been of the wrong-doers."

(638) but they have broken up and differed as regards their religion among themselves. (And) they all shall return to Us.

(639) And the true promise (Day of Resurrection) shall draw near (of fulfillment). Then (when mankind is resurrected from their graves), you shall see the eyes of the disbelievers fixedly staring in horror. (They will say): "Woe to us! We were indeed heedless of this - nay, but we were Zalimun (polytheists and wrong-doers)."

(640) Certainly you (disbelievers) and that which you are worshipping now besides Allah, are (but) fuel for Hell! (Surely), you will enter it.