'Witnesses' in the Bible

But if he will not give ear to you, take with you one or two more, that by the lips of two or three witnesses every word may be made certain.

So that you are witnesses against yourselves that you are the sons of those who put the prophets to death.

And they were not able to get it, though a number of false witnesses came.

Then the high priest, violently parting his robes, said, He has said evil against God: what more need have we of witnesses? for now his words against God have come to your ears:

Then says Pilate to him, Do you give no attention to what their witnesses say against you?