Acts 16:9–15 (ESV)

And a vision appeared to Paul in the night: a man of Macedonia was standing there, urging him and saying, “Come over to Macedonia and help us.” And when Paul had seen the vision, immediately we sought to go on into Macedonia, concluding that God had called us to preach the gospel to them.

So, setting sail from Troas, we made a direct voyage to Samothrace, and the following day to Neapolis, and from there to Philippi, which is a leading city of the district of Macedonia and a Roman colony. We remained in this city some days. And on the Sabbath day we went outside the gate to the riverside, where we supposed there was a place of prayer, and we sat down and spoke to the women who had come together. One who heard us was a woman named Lydia, from the city of Thyatira, a seller of purple goods, who was a worshipper of God. The Lord opened her heart to pay attention to what was said by Paul. And after she was baptized, and her household as well, she urged us, saying, “If you have judged me to be faithful to the Lord, come to my house and stay.” And she prevailed upon us.