Acts 16:12 (KJV)

And after he had seen the vision, immediately we endeavoured to go into Macedonia, assuredly gathering that the Lord had called us for to preach the gospel unto them.

Therefore loosing from Troas, we came with a straight course to Samothracia, and the next day to Neapolis;

And from thence to Philippi, which is the chief city of that part of Macedonia, and a colony: and we were in that city abiding certain days.

And on the sabbath we went out of the city by a river side, where prayer was wont to be made; and we sat down, and spake unto the women which resorted thither.

And a certain woman named Lydia, a seller of purple, of the city of Thyatira, which worshipped God, heard us: whose heart the Lord opened, that she attended unto the things which were spoken of Paul.