'Testimony' in the Bible

Now Moses was faithful in all His house as a servant, for a testimony of those things which were to be spoken later;

Anyone who has set aside the Law of Moses dies without mercy on the testimony of two or three witnesses.

By faith Abel offered to God a better sacrifice than Cain, through which he obtained the testimony that he was righteous, God testifying about his gifts, and through faith, though he is dead, he still speaks.