Theodoret of Cyrus, on Gal 2:1

“Then, after fourteen years, I went up again to Jerusalem with Barnabas, taking Titus also with me.”

“Both [Barnabas and Titus] spent an extended time in Antioch, making a large body of converts and binding them to live according to the law of grace. But some supporters of the law who arrived from Judea tried to persuade the Gentiles to adopt the way of life according to the law But those great heralds of the truth, Paul and Barnabas, repudiated the teaching they promoted. They wished to persuade the congregation of the faithful that this was also the view of the great apostles. So they immediately went straightway to Judea, to apprise the apostles of what was going on.”

Imported from an open dataset — not yet checked against the printed edition.