Exodus 13:7
Unleavened bread shall be eaten seven days. And there shall be no leavened bread seen with you, nor shall there be leaven seen with you in all your borders.
Exodus 12:19
Seven days there shall be no leaven found in your houses. For whoever eats that which is leavened, even that soul shall be cut off from the congregation of Israel, among the aliens and among the natives of the land.
Matthew 16:6
And Jesus said to them, Take heed, and beware the leaven of the Pharisees and of the Sadducees.
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