Parallel
Revelation 1:2
Robinson-Pierpont Byzantine Textform · Berean Standard Bible
ὃς ἐμαρτύρησεν τὸν λόγον τοῦ θεοῦ καὶ τὴν μαρτυρίαν Ἰησοῦ χριστοῦ, ὅσα εἶδεν.
who testifies to everything he saw. This is the word of God and the testimony of Jesus Christ.