7There were about twelve of them in all.
8Paul went to the synagogue there, and for three months spoke out fearlessly, giving addresses and trying to convince his hearers, about the kingdom of God.
9Some of them, however, hardened their hearts and refused to believe, denouncing the Way before the people. So Paul left them and withdrew his disciples, and gave daily addresses in the lecture-hall of Tyrannus.
Acts 19
Acts 19:7-9