'Matter' in the Bible

For, behold, this same thing, your being grieved according to God, how much diligence it wrought in you, but what excusing of yourselves, but what indignation, but what fear, but what ardent desire, but what zeal, but what vengeance: in every way ye have proved yourselves to be pure in the matter.

This third time I am coming to you. In the mouth of two or three witnesses shall every matter be established.