The word(s) "witnesses" appears 33 time(s) in 29 verse(s) in Quran in Abdullah Yusuf Ali translation.

(21) 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!

(22) And those who launch a charge against chaste women, and produce not four witnesses (to support their allegations),- flog them with eighty stripes; and reject their evidence ever after: for such men are wicked transgressors;-

(23) Why did they not bring four witnesses to prove it? When they have not brought the witnesses, such men, in the sight of Allah, (stand forth) themselves as liars!

(24) Or that We created the angels female, and they are witnesses (thereto)?

(25) And the Earth will shine with the Glory of its Lord: the Record (of Deeds) will be placed (open); the prophets and the witnesses will be brought forward and a just decision pronounced between them; and they will not be wronged (in the least).

(26) We will, without doubt, help our messengers and those who believe, (both) in this world's life and on the Day when the witnesses will stand forth,-

(27) Verily in this is a Message for any that has a heart and understanding or who gives ear and earnestly witnesses (the truth).

(28) And those who believe in Allah and His messengers- they are the Sincere (lovers of Truth), and the witnesses (who testify), in the eyes of their Lord: They shall have their Reward and their Light. But those who reject Allah and deny Our Signs,- they are the Companions of Hell-Fire.

(29) By one that witnesses, and the subject of the witness;-