1 Corinthians 4:6

4:6 I have applied these things to myself and Apollos because of you, brothers and sisters, so that through us you may learn “not to go beyond what is written,” so that none of you will be puffed up in favor of the one against the other.

1 Corinthians 5:11

5:11 But now I am writing to you not to associate with anyone who calls himself a Christian who is sexually immoral, or greedy, or an idolater, or verbally abusive, or a drunkard, or a swindler. Do not even eat with such a person.