Exodus 13:7
Unleavened bread shall be eaten throughout the seven days, and there shall no leavened bread be seen with thee, neither shall there be leaven seen with thee in all thy borders.
Exodus 12:19
Seven days there shall be no leaven found in your houses, for whoever eats that which is leavened, that soul shall be cut off from the congregation of Israel, whether he be a sojourner, or one who is born in the land.
Matthew 16:6
And Jesus said to them, Watch and beware of the leaven of the Pharisees and Sadducees.
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