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

(451) That is because those who disbelieve follow falsehood, while those who believe follow the truth from their Lord. Thus does Allah set forth for mankind their parables.

(452) So, when you meet (in fight - Jihad in Allah's Cause) those who disbelieve, smite (their) necks till when you have killed and wounded many of them, then bind a bond firmly (on them, i.e. take them as captives). Thereafter (is the time) either for generosity (i.e. free them without ransom), or ransom (according to what benefits Islam), until the war lays down its burden. Thus [you are ordered by Allah to continue in carrying out Jihad against the disbelievers till they embrace Islam and are saved from the punishment in the Hell-fire or at least come under your protection], but if it had been Allah's Will, He Himself could certainly have punished them (without you). But (He lets you fight) in order to test some of you with others. But those who are killed in the Way of Allah, He will never let their deeds be lost.

(453) But those who disbelieve (in the Oneness of Allah - Islamic Monotheism), for them is destruction, and (Allah) will make their deeds vain.

(454) Have they not travelled through the earth, and seen what was the end of those before them? Allah destroyed them completely, and a similar (fate awaits) the disbelievers.

(455) That is because Allah is the Maula (Lord, Master, Helper, Protector, etc.) of those who believe, and the disbelievers have no Maula (lord, master, helper, protector, etc.).

(456) Certainly Allah will admit those who believe (in the Oneness of Allah - Islamic Monotheism) and do righteous good deeds, to Gardens under which rivers flow (Paradise); while those who disbelieve enjoy themselves and eat as cattle eat; and the Fire will be their abode.

(457) Verily, those who have turned back (have apostatised) as disbelievers after the guidance has been manifested to them - Shaitan (Satan) has beautified for them (their false hopes), and (Allah) prolonged their term (age).

(458) Verily, those who disbelieve, and hinder (men) from the Path of Allah (i.e. Islam), and oppose the Messenger (صلى الله عليه وسلم) (by standing against him and hurting him), after the guidance has been clearly shown to them, they will not harm Allah in the least, but He will make their deeds fruitless,

(459) Verily, those who disbelieve, and hinder (men) from the Path of Allah (i.e. Islam); then die while they are disbelievers - Allah will not forgive them.

(460) And whosoever does not believe in Allah and His Messenger (Muhammad صلى الله عليه وسلم), then verily, We have prepared for the disbelievers a blazing Fire.