The word(s) "nay" appears 143 time(s) in 137 verse(s) in Quran in Mohsin Khan translation.

(21) And what think those who invent a lie against Allah, on the Day of Resurrection? [i.e. Do they think that they will be forgiven and excused! nay, they will have an eternal punishment in the Fire of Hell]. Truly, Allah is full of Bounty to mankind, but most of them are ungrateful.

(22) And they brought his shirt stained with false blood. He said: "nay, but your ownselves have made up a tale. So (for me) patience is most fitting. And it is Allah (Alone) Whose help can be sought against that (lie) which you describe."

(23) He [Ya'qub (Jacob)] said: "nay, but your ownselves have beguiled you into something. So patience is most fitting (for me). May be Allah will bring them (back) all to me. Truly He! Only He is All-Knowing, All-Wise."

(24) Is then He (Allah) Who takes charge (guards, maintains, provides) of every person and knows all that he has earned (like any other deities who know nothing)? Yet, they ascribe partners to Allah. Say: "Name them! Is it that you will inform Him of something He knows not in the earth or is it (just) a show of false words." nay! To those who disbelieved, their plotting is made fairseeming, and they have been hindered from the Right Path; and whom Allah sends astray, for him there is no guide.

(25) They would surely say (in the evening): "Our eyes have been (as if) dazzled (we have not seen any angel or heaven). nay, we are a people bewitched."

(26) They said: "nay, we have come to you with that (torment) which they have been doubting.

(27) Allah puts forward the example of (two men - a believer and a disbeliever); a slave (disbeliever) under the possession of another, he has no power of any sort, and (the other), a man (believer) on whom We have bestowed a good provision from Us, and he spends thereof secretly and openly. Can they be equal? (By no means). All the praises and thanks are to Allah. nay! (But) most of them know not.

(28) And when We change a Verse (of the Qur'an,) in place of another - and Allah knows best what He sends down - they (the disbelievers) say: "You (O Muhammad صلى الله عليه و سلم) are but a Muftari! (forger, liar)." nay, but most of them know not.

(29) And they will be set before your Lord in (lines as) rows, (and Allah will say): "Now indeed, you have come to Us as We created you the first time. nay, but you thought that We had appointed no meeting for you (with Us)."

(30) nay, We shall record what he says, and We shall increase his torment (in the Hell);