'Witness' in the Bible

For our witness does not come from error or from an unclean heart or from deceit:

For it is common knowledge among you that we never made use of smooth-sounding false words, and God is witness that at no time were we secretly desiring profit for ourselves,

Even as you saw how, like a father with his children, we were teaching and comforting you all, and giving witness,

And that no man may make attempts to get the better of his brother in business: for the Lord is the judge in all these things, as we said to you before and gave witness.