'Faithful Witness' in the Bible

It shall be established for ever as the moon, And as the faithful witness in the sky. Selah

A faithful witness will not lie; But a false witness uttereth lies.

and I will take unto me faithful witnesses to record, Uriah the priest, and Zechariah the son of Jeberechiah.

Then they said to Jeremiah, Jehovah be a true and faithful witness amongst us, if we do not according to all the word wherewith Jehovah thy God shall send thee to us.

and from Jesus Christ, who is the faithful witness, the firstborn of the dead, and the ruler of the kings of the earth. Unto him that loveth us, and loosed us from our sins by his blood;