The word(s) "not" appears 1997 time(s) in 1622 verse(s) in Quran in Muhammad Pickthal translation.

(1061) So they plotted a plot: and We plotted a plot, while they perceived not.

(1062) Is not He (best) Who created the heavens and the earth, and sendeth down for you water from the sky wherewith We cause to spring forth joyous orchards, whose trees it never hath been yours to cause to grow. Is there any Allah beside Allah? Nay, but they are folk who ascribe equals (unto Him)!

(1063) Is not He (best) Who made the earth a fixed abode, and placed rivers in the folds thereof, and placed firm hills therein, and hath set a barrier between the two seas? Is there any Allah beside Allah? Nay, but most of them know not!

(1064) Is not He (best) Who answereth the wronged one when he crieth unto Him and removeth the evil, and hath made you viceroys of the earth? Is there any Allah beside Allah? Little do they reflect!

(1065) Is not He (best) Who guideth you in the darkness of the land and the sea, He Who sendeth the winds as heralds of His mercy? Is there any Allah beside Allah? High Exalted be Allah from all that they ascribe as partner (unto Him)!

(1066) Is not He (best) Who produceth creation, then reproduceth it, and Who provideth for you from the heaven and the earth? Is there any Allah beside Allah? Say: Bring your proof, if ye are truthful!

(1067) Say (O Muhammad): None in the heavens and the earth knoweth the Unseen save Allah; and they know not when they will be raised (again).

(1068) Nay, but doth their knowledge reach to the Hereafter? Nay, for they are in doubt concerning it. Nay, for they cannot see it.

(1069) And grieve thou not for them, nor be in distress because of what they plot (against thee).

(1070) Lo! thy Lord is full of bounty for mankind, but most of them do not give thanks.