The word(s) "witness" appears 123 time(s) in 99 verse(s) in Quran in Mohsin Khan translation.

(81) We will show them Our Signs in the universe, and in their own selves, until it becomes manifest to them that this (the Qur'an) is the truth. Is it not sufficient in regard to your Lord that He is a witness over all things?

(82) And they make the angels who themselves are slaves of the Most Gracious (Allah) females. Did they witness their creation? Their testimony will be recorded, and they will be questioned!

(83) And those whom they invoke instead of Him have no power of intercession - except for those who bear witness to the truth knowingly (i.e. believed in the Oneness of Allah, and obeyed His Orders), and they know (the facts about the Oneness of Allah).

(84) Or say they: "He (Muhammad صلى الله عليه وسلم) has fabricated it." Say: "If I have fabricated it? still you have no power to support me against Allah. He knows best of what you say among yourselves concerning it (i.e. this Qur'an)! Sufficient is He as a witness between me and you! And He is the Oft-Forgiving, the Most Merciful."

(85) Say: "Tell me! If this (Qur'an) is from Allah and you deny it, and a witness from among the Children of Israel ('Abdullah bin Salam رضي الله عنه) testifies that [this Qur'an is from Allah (like the Taurat (Torah)], and he believed (embraced Islam) while you are too proud (to believe)." Verily, Allah guides not the people who are Zalimun (polytheists, disbelievers and wrong-doers).

(86) Verily, We have sent you (O Muhammad صلى الله عليه وسلم) as a witness, as a bearer of glad tidings, and as a warner .

(87) He it is Who has sent His Messenger (Muhammad صلى الله عليه وسلم) with guidance and the religion of truth (Islam), that He may make it (Islam) superior to all religions. And All-Sufficient is Allah as a witness.

(88) And every person will come forth along with an (angel) to drive (him) and an (angel) to bear witness.

(89) On the Day when Allah will resurrect them all together (i.e. on the Day of Resurrection) and inform them of what they did. Allah has kept account of it, while they have forgotten it. And Allah is witness over all things.

(90) Have you (O Muhammad صلى الله عليه وسلم) not observed the hypocrites who say to their friends among the people of the Scripture who disbelieve: "(By Allah) If you are expelled, we (too) indeed will go out with you, and we shall never obey any one against you; and if you are attacked (in fight), we shall indeed help you." But Allah is witness that they verily are liars.