Matthew 18:17
If he refuses to hear them, appeal to the Church; and if he refuses to hear even the Church, regard him just as you regard a Gentile or a tax-gatherer.
John 9:22
Such was their answer, because they were afraid of the Jews; for the Jews had already settled among themselves that if any one should acknowledge Jesus as the Christ, he should be excluded from the synagogue.
John 9:34
"You," they replied, "were wholly begotten and born in sin, and do *you* teach *us*?" And they put him out of the synagogue.
John 16:2
You will be excluded from the synagogues; nay more, the time is coming when any one who has murdered one of you will suppose he is offering service to God.
1 Corinthians 5:13
while you leave to God's judgement those who are outside? Remove the wicked man from among you.