Testifying both to the Jews, and also to the Greeks, repentance toward God, and faith toward our Lord Jesus Christ.
Berean Study Bible (BSB) - Acts 20:21 >testifying to Jews and Greeks alike about repentance to God and faith in our Lord Jesus Christ.
Textus Receptus (TR) - Acts 20:21 >διαμαρτυρόμενος Ἰουδαίοις τε καὶ Ἕλλησι τὴν εἰς τὸν Θεὸν μετάνοιαν, καὶ πίστιν τὴν εἰς τὸν Κύριον ἡμῶν Ἰησοῦν Χριστόν.