Acts 19:8

⁸הוּא נִכְנַס לְבֵית הַכְּנֶסֶת וְדִבֵּר בְּאֹמֶץ לֵב. בְּמֶשֶׁךְ שְׁלוֹשָׁה חֳדָשִׁים טָעַן וְשִׁכְנֵעַ בְּעִנְיַן מַלְכוּת אֱלֹהִים.

Acts 19 marks a pivotal turning point in Paul's ministry: the extended stay in Ephesus. This chapter is a dense narrative of gospel advance and cultural collision. Paul finds a group of disciples who only knew John's baptism, corrects their understanding, and the Holy Spirit falls.