Acts 19:9-11

Young's Literal Translation

⁹ and when certain were hardened and were disbelieving, speaking evil of the way before the multitude, having departed from them, he did separate the disciples, every day reasoning in the school of a certain Tyrannus.

¹⁰ And this happened for two years so that all those dwelling in Asia did hear the word of the Lord Jesus, both Jews and Greeks,

¹¹ mighty works also -- not common -- was God working through the hands of Paul,