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

(61) They said: Swear one to another by Allah that we verily will attack him and his household by night, and afterward we will surely say unto his friend: We witnessed not the destruction of his household. And lo! we are truthtellers.

(62) And We shall take out from every nation a witness and We shall say: Bring your proof. Then they will know that Allah hath the Truth, and all that they invented will have failed them.

(63) Say (unto them, O Muhammad): Allah sufficeth for witness between me and you. He knoweth whatsoever is in the heavens and the earth. And those who believe in vanity and disbelieve in Allah, they it is who are the losers.

(64) O Prophet! Lo! We have sent thee as a witness and a bringer of good tidings and a warner.

(65) It is no sin for them (thy wives) to converse freely) with their fathers, or their sons, or their brothers, or their brothers' sons, or the sons of their sisters or of their own women, or their slaves. O women! Keep your duty to Allah. Lo! Allah is ever witness over all things.

(66) Say: Whatever reward I might have asked of you is yours. My reward is the affair of Allah only. He is witness over all things.

(67) This day We seal up their mouths, and their hands speak out to Us and their feet bear witness as to what they used to earn.

(68) And the earth shineth with the light of her Lord, and the Book is set up, and the prophets and the witnesses are brought, and it is judged between them with truth, and they are not wronged.

(69) Lo! We verily do help Our messengers, and those who believe, in the life of the world and on the day when the witnesses arise,

(70) Unto Him is referred (all) knowledge of the Hour. And no fruits burst forth from their sheaths, and no female carrieth or bringeth forth but with His knowledge. And on the day when He calleth unto them: Where are now My partners? they will say: We confess unto Thee, not one of us is a witness (for them).