1 Corinthians 5:10-11
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10not at all meaning the immoral of this world, or the greedy and robbers, or idolaters, since then you would need to go out of the world. 11But rather I wrote to you not to associate with any one who bears the name of brother if he is guilty of immorality or greed, or is an idolater, reviler, drunkard, or robber--not even to eat with such a one.
1 Corinthians 5:10-11 (RSV)