Parallel
John 15:27
Patriarchal Greek New Testament (1904) · Berean Standard Bible
καὶ ὑμεῖς δὲ μαρτυρεῖτε, ὅτι ἀπ᾽ ἀρχῆς μετ᾽ ἐμοῦ ἐστε.
And you also must testify, because you have been with Me from the beginning.