6Now when they had gone through Phrygia and the region of Galatia, having been forbidden by the Holy Spirit to speak the word in Asia,
7they approached Mysia and tried to go to Bithynia, but the Spirit did not permit them.
8So they bypassed Mysia and went down to Troas.
9A vision appeared to Paul during the night: a man of Macedonia was standing, appealing to him and saying, “Come over to Macedonia and help us.”
10So when he saw the vision, we immediately prepared to go over to Macedonia, concluding that the Lord had called us to evangelize them.
Acts 16
Acts 16:6-10