CLV(i)
5 to give up such a one to Satan for the extermination of the flesh, that the spirit may be saved in the day of the Lord Jesus."
6 Not ideal is your boast. Are you not aware that a little leaven is leavening the whole kneading?
7 Clean out, then, the old leaven, that you may be a fresh kneading, according as you are unleavened. For our Passover also, Christ, was sacrificed for our sakes"