Certain men [i.e., believers, see verse 5] came down from Judea [to Antioch of Syria] and began teaching the brothers this: You cannot be saved unless you are circumcised according to the custom [required] by Moses.

As his custom was, Paul went into the synagogue, [and] for three Sabbath days [in a row] he taught them from the Scriptures,

I answered them that it is not the custom of the Romans to turn over any person [for sentencing] before he is faced by his accusers and has had the opportunity to defend himself against the charges made against him.