'Witness' in the Bible

and from Jesus Christ, the truthful witness, the first of the dead to be born to Life, and the Ruler of the kings of the earth. To Him who loves us and has freed us from our sins with His own blood,

Satan's throne is there; and yet you are true to Me, and did not deny your faith in Me, even in the days of Antipas My witness and faithful friend, who was put to death among you, in the place where Satan dwells.

"And to the minister of the Church at Laodicea write as follows: "'This is what the Amen says--the true and faithful witness, the Beginning and Lord of God's Creation.

After this, when the doors of the sanctuary of the tent of witness in Heaven were opened, I looked;