1 Corinthians 5:5-7

New Revised Standard Version Catholic Edition

⁵ you are to hand this man over to Satan for the destruction of the flesh, so that his spirit may be saved in the day of the Lord.^[a]

⁶ Your boasting is not a good thing. Do you not know that a little yeast leavens the whole batch of dough? ⁷ Clean out the old yeast so that you may be a new batch, as you really are unleavened. For our paschal lamb, Christ, has been sacrificed.