The word(s) "disbelieve" appears 631 time(s) in 561 verse(s) in Quran in Mohsin Khan translation.

(501) (And remember) the Day when He will gather you (all) on the Day of Gathering, - that will be the Day of mutual loss and gain (i.e. loss for the disbelievers as they will enter the Hell-fire and gain for the believers as they will enter Paradise). And whosoever believes in Allah and performs righteous good deeds, He will expiate from him his sins, and will admit him to Gardens under which rivers flow (Paradise) to dwell therein forever; that will be the great success.

(502) But those who disbelieved (in the Oneness of Allah - Islamic Monotheism) and denied Our Ayat (proofs, evidence, verses, lessons, signs, revelations, etc.), they will be the dwellers of the Fire, to dwell therein forever. And worst indeed is that destination .

(503) (It will be said in the Hereafter) O you who disbelieve (in the Oneness of Allah - Islamic Monotheism)! Make no excuses this Day! You are being requited only for what you used to do.

(504) O Prophet (Muhammad صلى الله عليه وسلم)! Strive hard against the disbelievers and the hypocrites, and be severe against them; their abode will be Hell, and worst indeed is that destination.

(505) Allah sets forth an example for those who disbelieve: the wife of Nuh (Noah) and the wife of Lut (Lot). They were under two of our righteous slaves, but they both betrayed them (their husbands by rejecting their doctrine). So they [Nuh (Noah) and Lut (Lot) عليهما السلام] availed them (their respective wives) not against Allah and it was said: "Enter the Fire along with those who enter!"

(506) And Allah has set forth an example for those who believe: the wife of Fir'aun (Pharaoh), when she said: "My Lord! Build for me a home with You in Paradise, and save me from Fir'aun (Pharaoh) and his work, and save me from the people who are Zalimun (polytheists, wrong-doers and disbelievers in Allah).

(507) And for those who disbelieve in their Lord (Allah) is the torment of Hell, and worst indeed is that destination.

(508) Who is he besides the Most Gracious that can be an army to you to help you? The disbelievers are in nothing but delusion.

(509) But when they will see it (the torment on the Day of Resurrection) approaching, the faces of those who disbelieve will change and turn black with sadness and in grief and it will be said (to them): "This is (the promise) which you were calling for!"

(510) Say (O Muhammad صلى الله عليه وسلم): "Tell me! If Allah destroys me, and those with me, or He bestows His Mercy on us - who can save the disbelievers from a painful torment?"