1 Corinthians 5:6-13

61Your boasting is not good. 2Do you not know that 3a little 4leaven leavens the whole lump of dough? 7Clean out the old leaven so that you may be a new lump, just as you are in fact unleavened. For Christ our 5Passover also has been sacrificed. 8Therefore let’s celebrate the feast, 6not with old leaven, nor with the leaven of malice and wickedness, but with the unleavened bread of sincerity and truth.

9I wrote to you in my letter 7not to associate with sexually immoral people; 10I did not at all mean with the sexually immoral people of this world, or with the greedy and swindlers, or with 8idolaters, for then you would have to leave the world. 11But 9actually, I 10wrote to you not to associate 11with any so-called 12brother if he is a sexually immoral person, or a greedy person, or 13an idolater, or is verbally abusive, or habitually drunk, or a swindler--not even to eat with such a person. 12For what business of mine is it to judge 14outsiders? 15Do you not judge those who are within the church? 13But those who are outside, God 16judges. 17Remove the evil person from among yourselves.