The word(s) "not" appears 1837 time(s) in 1517 verse(s) in Quran in Abdullah Yusuf Ali translation.

(541) Be not then in doubt as to what these men worship. They worship nothing but what their fathers worshipped before (them): but verily We shall pay them back (in full) their portion without (the least) abatement.

(542) We certainly gave the Book to Moses, but differences arose therein: had it not been that a word had gone forth before from thy Lord, the matter would have been decided between them, but they are in suspicious doubt concerning it.

(543) Therefore stand firm (in the straight Path) as thou art commanded,- thou and those who with thee turn (unto Allah); and transgress not (from the Path): for He seeth well all that ye do.

(544) And incline not to those who do wrong, or the Fire will seize you; and ye have no protectors other than Allah, nor shall ye be helped.

(545) And be steadfast in patience; for verily Allah will not suffer the reward of the righteous to perish.

(546) Why were there not, among the generations before you, persons possessed of balanced good sense, prohibiting (men) from mischief in the earth - except a few among them whom We saved (from harm)? But the wrong-doers pursued the enjoyment of the good things of life which were given them, and persisted in sin.

(547) If thy Lord had so willed, He could have made mankind one people: but they will not cease to dispute.

(548) Say to those who do not believe: "Do what ever ye can: We shall do our part;

(549) To Allah do belong the unseen (secrets) of the heavens and the earth, and to Him goeth back every affair (for decision): then worship Him, and put thy trust in Him: and thy Lord is not unmindful of aught that ye do.

(550) We do relate unto thee the most beautiful of stories, in that We reveal to thee this (portion of the) Qur'an: before this, thou too was among those who knew it not.