But some men came down from Judea and attempted to teach the brethren, saying, "Unless you are circumcised according to Moses' custom, you cannot be saved."

and Paul, according to his usual custom, went in to them and, for three Sabbath Days, he reasoned with them out of the Scriptures,

I told them that it was not the custom of the Romans to give any man up for punishment, before the accused had his accusers face to face, and had opportunity of defending himself against the charges that had been brought against him.