1 Corinthians 5:7-9

Darby Translation

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;