'Witness' in the Bible

The show of their countenance doth witness against them; and they declare their sin as Sodom, they hide it not. Woe unto their soul! for they have done evil unto themselves.

And it shall be for a sign and for a witness unto Jehovah of hosts in the land of Egypt; for they shall cry unto Jehovah because of oppressors, and he will send them a saviour, and a defender, and he will deliver them.

Behold, I have given him for a witness to the peoples, a leader and commander to the peoples.