Acts 26:29

Paul responded to the king very politely but firmly. He wished that all his hearers, not just Agrippa, might become Christians. Paul’s reference to his chains may have been literal-he may have been wearing chains as he spoke-or perhaps metaphorical-he may have been referring to his condition as a prisoner. I am not aware of any evidence that Agrippa ever became a Christian.

"The speech before King Agrippa is more than a defense speech. It begins as a defense speech (cf. Acts 26:1), and it develops aspects of previous defense speeches, but its functions are broader. It combines themes from the defense speeches with themes from the earlier narrative, reaching back to the missions of John the Baptist, Jesus, and the apostles, and fashions these into a summary statement of Paul’s place in the unfolding purpose of God. Then Paul continues his mission before our eyes as his review of his past message becomes present proclamation, ending with a missionary appeal to King Agrippa." [Note: Tannehill, 2:316.]