Acts 16:7-10

7and when they were come over against Mysia, they assayed to go into Bithynia; and the Spirit of Jesus suffered them not; 8and passing by Mysia, they came down to Troas. 9And a vision appeared to Paul in the night: There was a man of Macedonia standing, beseeching him, and saying, Come over into Macedonia, and help us. 10And when he had seen the vision, straightway we sought to go forth into Macedonia, concluding that God had called us to preach the gospel unto them.