Who bare record of the word of God, and of the testimony of Jesus Christ, and of all things that he saw.
Berean Study Bible (BSB) - Revelation 1:2 >who testifies to everything he saw. This is the word of God and the testimony of Jesus Christ.
Textus Receptus (TR) - Revelation 1:2 >ὃς ἐμαρτύρησε τὸν λόγον τοῦ Θεοῦ καὶ τὴν μαρτυρίαν Ἰησοῦ Χριστοῦ, ὅσα τε εἶδε.