28 For he vigorously refuted the Jews in public, demonstrating through the Scriptures that Jesus is the Messiah.
Acts 18:28
Testimony
5 When Silas and Timothy arrived from Macedonia, Paul devoted himself to preaching the word[Other mss read was urged by the Spirit] and testified to the Jews that Jesus is the Messiah.
Acts 18:5
EXAMPLES
24 Now a Jew named Apollos, a native Alexandrian, an eloquent man who was competent in the use of the Scriptures, arrived in Ephesus. 25 He had been instructed in the way of the Lord; and being fervent in spirit,[Or in the Spirit] he was speaking and teaching accurately about Jesus, although he knew only John’s baptism.
Acts 18:24-25