Now, it is actually being said that there is sexual immorality among you so terrible that not even the heathen would be guilty of it. I am told that a man is sleeping with his stepmother! 1
References for 1 Corinthians 5:1
How, then, can you be proud? On the contrary, you should be filled with sadness, and the man who has done such a thing should be expelled from your fellowship.
And even though I am far away from you in body, still I am there with you in spirit; and as though I were there with you, I have in the name of our Lord Jesus already passed judgment on the man who has done this terrible thing. As you meet together, and I meet with you in my spirit, by the power of our Lord Jesus present with us,
you are to hand this man over to Satan for his body to be destroyed, so that his spirit may be saved in the Day of the Lord.
It is not right for you to be proud! You know the saying, "A little bit of yeast makes the whole batch of dough rise." 2
References for 1 Corinthians 5:6
You must remove the old yeast of sin so that you will be entirely pure. Then you will be like a new batch of dough without any yeast, as indeed I know you actually are. For our Passover Festival is ready, now that Christ, our Passover lamb, has been sacrificed. 3
References for 1 Corinthians 5:7
Let us celebrate our Passover, then, not with bread having the old yeast of sin and wickedness, but with the bread that has no yeast, the bread of purity and truth. 4
References for 1 Corinthians 5:8
5.8 Ex 13.7; Dt 16.3.
In the letter that I wrote you I told you not to associate with immoral people.
Now I did not mean pagans who are immoral or greedy or are thieves, or who worship idols. To avoid them you would have to get out of the world completely.
What I meant was that you should not associate with a person who calls himself a believer but is immoral or greedy or worships idols or is a slanderer or a drunkard or a thief. Don't even sit down to eat with such a person.
After all, it is none of my business to judge outsiders. God will judge them. But should you not judge the members of your own fellowship? As the scripture says, "Remove the evil person from your group." 5
References for 1 Corinthians 5:12
5.13 Dt 13.5; 17.7 (LXX).