Acts chapter 12 is the last focus on Peter and Jerusalem church in Acts. Herod had James killed to please the Jews and then arrested Peter. God miraculously rescued Peter from prison as believers were praying for him. Herod died suddenly. Barnabas and Paul returned from Jerusalem to Antioch and brought John Mark with them. Paul and Barnabas leave on their first missionary journey. They took John Mark with them, but John Mark left them after a short time.