“… Jehovah spoke unto Moses, saying: ‘Command the children of Israel that they put out of the camp every leper and every one that has an issue and whosoever is defiled by the dead.
Both male and female shall you put out. Without the camp shall you put them, that they defile not their camps in the midst of where I dwell.’”
“A man that is an heretic after the first and second admonition reject, knowing that he that is such is subverted and sins, being condemned of himself.”
“[Do] not to keep company with any man that is ‘called’ a brother who is a fornicator, or covetous, or an idolater, or a railer, or a drunkard, or an extortioner. With such a one know not to eat.”
“… Do you not judge them that are within? But them that are without God judges. Therefore put away from among yourselves that wicked person.”
1 Corinthians 5:11-13