1 Corinthians 5:8

5:8 So then, let us celebrate the festival, not with the old yeast, the yeast of vice and evil, but with the bread without yeast, the bread of sincerity and truth.

1 Corinthians 14:20

14:20 Brothers and sisters, do not be children in your thinking. Instead, be infants in evil, but in your thinking be mature.