2 As his custom was, Paul went into the synagogue, and on three Sabbath days he reasoned with them from the Scriptures, 3 explaining and proving that the Christ had to suffer and rise from the dead. “This Jesus I am proclaiming to you is the Christ,” he said.
From BibleGateway.com: http://www.biblegateway.com/passage/?search=Acts 17:2-3&version=NIV1984