1 Corinthians 5:7-8; 1 Peter 1:19

1 Corinthians 5:7-8

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.

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.

1 Peter 1:19

19 but with the precious blood of Christ, as of a lamb without blemish and without spot.