1 Corinthians 5:6-13

6Your boasting [is] not good. Do ye not know that a little leaven leavens the whole lump? 7Purge out the old leaven, that ye may be a new lump, according as ye are unleavened. For also our passover, Christ, has been sacrificed; 8so that let us celebrate the feast, not with old leaven, nor with leaven of malice and wickedness, but with unleavened [bread] of sincerity and truth. 9I have written to you in the epistle not to mix with fornicators; 10not altogether with the fornicators of this world, or with the avaricious and rapacious, or idolaters, since [then] ye should go out of the world. 11But now I have written to you, if any one called brother be fornicator, or avaricious, or idolater, or abusive, or a drunkard, or rapacious, not to mix with [him]; with such a one not even to eat. 12For what have I [to do] with judging those outside also? ye, do not ye judge them that are within? 13But those without 1God judges. Remove the wicked person from amongst yourselves.