For thou shalt be his witness unto all men of what thou hast seen and heard.
Berean Study Bible (BSB) - Acts 22:15 >You will be His witness to everyone of what you have seen and heard.
Textus Receptus (TR) - Acts 22:15 >Ὅτι ἔσῃ μάρτυς αὐτῷ πρὸς πάντας ἀνθρώπους ὧν ἑώρακας καὶ ἤκουσας.