The word(s) "witness" appears 132 time(s) in 112 verse(s) in Quran in Abdullah Yusuf Ali translation.

(51) One day We shall raise from all Peoples a witness against them, from amongst themselves: and We shall bring thee as a witness against these (thy people): and We have sent down to thee the Book explaining all things, a Guide, a Mercy, and Glad Tidings to Muslims.

(52) Say: "Enough is Allah for a witness between me and you: for He is well acquainted with His servants, and He sees (all things).

(53) I called them not to witness the creation of the heavens and the earth, nor (even) their own creation: nor is it for helpers such as Me to take as lead (men) astray!

(54) He said, "Nay, your Lord is the Lord of the heavens and the earth, He Who created them (from nothing): and I am a witness to this (Truth).

(55) They said, "Then bring him before the eyes of the people, that they may bear witness."

(56) And remember David and Solomon, when they gave judgment in the matter of the field into which the sheep of certain people had strayed by night: We did witness their judgment.

(57) Those who believe (in the Qur'an), those who follow the Jewish (scriptures), and the Sabians, Christians, Magians, and Polytheists,- Allah will judge between them on the Day of Judgment: for Allah is witness of all things.

(58) "That they may witness the benefits (provided) for them, and celebrate the name of Allah, through the Days appointed, over the cattle which He has provided for them (for sacrifice): then eat ye thereof and feed the distressed ones in want.

(59) And strive in His cause as ye ought to strive, (with sincerity and under discipline). He has chosen you, and has imposed no difficulties on you in religion; it is the cult of your father Abraham. It is He Who has named you Muslims, both before and in this (Revelation); that the Messenger may be a witness for you, and ye be witnesses for mankind! So establish regular Prayer, give regular Charity, and hold fast to Allah! He is your Protector - the Best to protect and the Best to help!

(60) The woman and the man guilty of adultery or fornication,- flog each of them with a hundred stripes: Let not compassion move you in their case, in a matter prescribed by Allah, if ye believe in Allah and the Last Day: and let a party of the Believers witness their punishment.