'Witness' in the Bible

beginning from the baptism of John, to the day that he was received up from us, of these one must become a witness with us of his resurrection."

Yet he didn't leave himself without witness, in that he did good and gave you rains from the sky and fruitful seasons, filling our hearts with food and gladness."

For you will be a witness for him to all men of what you have seen and heard.

When the blood of Stephen, your witness, was shed, I also was standing by, and consenting to his death, and guarding the cloaks of those who killed him.'

But arise, and stand on your feet, for I have appeared to you for this purpose: to appoint you a servant and a witness both of the things which you have seen, and of the things which I will reveal to you;