The word(s) "not" appears 2535 time(s) in 1947 verse(s) in Quran in Mohsin Khan translation.

(621) Allah said: "Verily, the invocation of you both is accepted. So you both keep to the Straight Way (i.e. keep on doing good deeds and preaching Allah's Message with patience), and follow not the path of those who know not (the truth i.e. to believe in the Oneness of Allah, and also to believe in the Reward of Allah: Paradise)."

(622) And indeed We settled the Children of Israel in an honourable dwelling place (Sham and Misr), and provided them with good things, and they differed not until the knowledge came to them. Verily, Allah will judge between them on the Day of Resurrection in that in which they used to differ.

(623) So if you (O Muhammad صلى الله عليه وسلم) are in doubt concerning that which We have revealed unto you, [i.e. that your name is written in the Taurat (Torah) and the Injeel (Gospel)], then ask those who are reading the Book [the Taurat (Torah) and the Injeel (Gospel)] before you. Verily, the truth has come to you from your Lord. So be not of those who doubt (it).

(624) And be not one of those who belie the Ayat (proofs, evidence, verses, lessons, signs, revelations, etc.) of Allah, for then you shall be one of the losers.

(625) Truly! Those, against whom the Word (Wrath) of your Lord has been justified, will not believe.

(626) It is not for any person to believe, except by the Leave of Allah, and He will put the wrath on those who are heedless.

(627) Say: "Behold all that is in the heavens and the earth," but neither Ayat (proofs, evidence, verses, lessons, signs, revelations, etc.) nor warners benefit those who believe not.

(628) "And (it is revealed to me): Direct your face (O Muhammad صلى الله عليه وسلم) entirely towards the religion Hanif (Islamic Monotheism, i.e. to worship none but Allah Alone), and never be one of the Mushrikun (those who ascribe partners to Allah, polytheists, idolaters, disbelievers in the Oneness of Allah, and those who worship others along with Allah).

(629) "And invoke not besides Allah, any such that will neither profit you nor harm you, but if (in case) you did so, you shall certainly be one of the Zalimun (polytheists and wrong-doers). "

(630) Say: "O you mankind! Now truth (i.e. the Qur'an and Prophet Muhammad صلى الله عليه وسلم) has come to you from your Lord. So whosoever receives guidance, he does so for the good of his own self; and whosoever goes astray, he does so to his own loss; and I am not (set) over you as a Wakil (disposer of affairs to oblige you for guidance)."