1 Corinthians 5:8-10

King James Version

⁸ Therefore let us keep the feast, not with old leaven, neither with the leaven of malice and wickedness; but with the unleavened bread of sincerity and truth.

⁹ I wrote unto you in an epistle not to company with fornicators:

¹⁰ Yet not altogether with the fornicators of this world, or with the covetous, or extortioners, or with idolaters; for then must ye needs go out of the world.