1 Corinthians 5:8 DBY

⁶  Your boasting [is] not good. Do ye not know that a little leaven leavens the whole lump?

⁷  Purge out the old leaven, that ye may be a new lump, according as ye are unleavened. For also our passover, Christ, has been sacrificed;

⁸  so 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.

⁹  I have written to you in the epistle not to mix with fornicators;

¹⁰  not altogether with the fornicators of this world, or with the avaricious and rapacious, or idolaters, since [then] ye should go out of the world.