Acts 14:1-3 NIV
At Iconium Paul and Barnabas went as usual into the Jewish synagogue. There they spoke so effectively that a great number of Jews and Greeks believed. But the Jews who refused to believe stirred up the other Gentiles and poisoned their minds against the brothers. So Paul and Barnabas spent considerable time there, speaking boldly for the Lord, who confirmed the message of his grace by enabling them to perform signs and wonders.
NIV: New International Version