Parallel
Acts 22:15
Patriarchal Greek New Testament (1904) · Berean Standard Bible
ὅτι ἔσῃ μάρτυς αὐτῷ πρὸς πάντας ἀνθρώπους ὧν ἑώρακας καὶ ἤκουσας.
You will be His witness to everyone of what you have seen and heard.