1 Peter 1:18-19

1:18 You know that from your empty way of life inherited from your ancestors you were ransomed – not by perishable things like silver or gold, 1:19 but by precious blood like that of an unblemished and spotless lamb, namely Christ.

1 Corinthians 5:7

5:7 Clean out the old yeast so that you may be a new batch of dough – you are, in fact, without yeast. For Christ, our Passover lamb, has been sacrificed.