Acts 19:7-11

There were about twelve men in all.

And he entered the synagogue and continued speaking out boldly for three months, having discussions and persuading them about the kingdom of God.

But when some were becoming hardened and disobedient, speaking evil of the Way before the people, he withdrew from them and took the disciples away with him, and had discussions daily in the school of Tyrannus.

This took place for two years, so that all who lived in Asia heard the word of the Lord, both Jews and Greeks. Miracles at Ephesus

God was performing extraordinary miracles by the hands of Paul,