1 Corinthians 5:2, 7

You are so proud of yourselves, but you should be mourning in sorrow and shame. And you should remove this man from your fellowship.

Get rid of the old “yeast” by removing this wicked person from among you. Then you will be like a fresh batch of dough made without yeast, which is what you really are. Christ, our Passover Lamb, has been sacrificed for us.