you are to deliver this man to Satan for the destruction of the flesh, so that his spirit may be saved in the day of the Lord. Your boasting is not good. Do you not know that (((a little leaven leavens the whole lump?))) Cleanse out the old leaven that you may be a new lump, as you really are unleavened. For Christ, our Passover lamb, has been sacrificed.
1 Corinthians 5:5-7 ESV
https://bible.com/bible/59/1co.5.5-7.ESV