1 Corinthians 5:9

5:9 I wrote you in my letter not to associate with sexually immoral people.

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.