Exodus 13:7
Unleavened bread shall be eaten seven days. No leavened bread shall be seen with you or in all your borders.
Exodus 12:19
There shall be no leaven found in your houses for seven days. Whoever eats what is leavened shall be cut off from the congregation of Israel, whether he is an alien or a native of the land.
Matthew 16:6
Jesus said: Take care to have nothing to do with the leaven of the Pharisees and Sadducees.
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