'Custom' in the Bible

But certain persons who had come down from Judaea tried to convince the brethren, saying, "Unless you are circumcised in accordance with the Mosaic custom, you cannot be saved."

Paul--following his usual custom--betook himself to it, and for three successive Sabbaths reasoned with them from the Scriptures,

My reply was that it is not the custom among the Romans to give up any one for punishment before the accused has had his accusers face to face, and has had an opportunity of defending himself against the charge which has been brought against him.