NT-EPISTLES.filter - nkjv leavened:

nkjv@1Corinthians:5:7 @ Therefore purge out the old leaven, that you may be a new lump, since you truly are unleavened. For indeed Christ, our Passover, was sacrificed for us.

nkjv@1Corinthians:5:8 @ Therefore let us keep the feast, not with old leaven, nor with the leaven of malice and wickedness, but with the unleavened bread of sincerity and truth.