John Calvin on Acts 12:25

25 And Barnabas and Paul. The ministry which Luke saith Barnabas and Paul did finish, must be referred unto the alms, whereof mention was made before. For after that Agabus the prophet had foretold the famine and barrenness, the brethren gathered money at Antioch, whereby they might relieve the necessity of the church which was at Jerusalem; the carrying of this money was committed to Barnabas and Paul. Now Luke saith that they returned to Antioch, that he may pass over unto a new history. He addeth, that they took with them John, whose surname was Mark, whose mother was honorably commended before, that he might keep them company, who was afterward, as we shall see, a cause of grievous and dangerous [hurtful] discord between them.

CHAPTER 13

Acts 13:1-3

1. And there were in the church which was at Antioch certain prophets and teachers: Barnabas, and Simeon, called Niger, Lucius of Cyrene, and Manaen, who had been brought up with Herod and Saul. 2. And as they ministered unto the Lord, and fasted, the Holy Ghost said, Separate to me Barnabas and Saul unto the work whereto I have called them. 3. Then after they had fasted and prayed, and laid the hands upon them, they let them go.