The word(s) "witness" appears 111 time(s) in 90 verse(s) in Quran in Muhammad Pickthal translation.

(41) Who doeth greater wrong than he who inventeth a lie concerning Allah? Such will be brought before their Lord, and the witnesses will say: These are they who lied concerning their Lord. Now the curse of Allah is upon wrong-doers,

(42) We say naught save that one of our gods hath possessed thee in an evil way. He said: I call Allah to witness, and do ye (too) bear witness, that I am innocent of (all) that ye ascribe as partners (to Allah)

(43) Lo! herein verily there is a portent for those who fear the doom of the Hereafter. That is a day unto which mankind will be gathered, and that is a day that will be witnessed.

(44) (Joseph) said: She it was who asked of me an evil act. And a witness of her own folk testified: If his shirt is torn from before, then she speaketh truth and he is of the liars.

(45) They who disbelieve say: Thou art no messenger (of Allah). Say: Allah, and whosoever hath knowledge of the Scripture, is sufficient witness between me and you.

(46) And (bethink you of) the day when we raise up of every nation a witness, then there is no leave for disbelievers, nor are they allowed to make amends.

(47) And (bethink you of) the day when We raise in every nation a witness against them of their own folk, and We bring thee (Muhammad) as a witness against these. And We reveal the Scripture unto thee as an exposition of all things, and a guidance and a mercy and good tidings for those who have surrendered (to Allah).

(48) Establish worship at the going down of the sun until the dark of night, and (the recital of) the Qur'an at dawn. Lo! (the recital of) the Qur'an at dawn is ever witnessed.

(49) Say: Allah sufficeth for a witness between me and you. Lo! He is Knower, Seer of His slaves.

(50) I made them not to witness the creation of the heavens and the earth, nor their own creation; nor choose I misleaders for (My) helpers.