What Is Actual Leaven Scripture Talks About?

The Spring Feasts roll around and all of the questions about leaven start coming up. Scripture says to remove the leaven from our homes. But what constitutes as leaven? Most people today don't know what leaven actually is in the same terms that the people of the past knew. If you made your "daily bread", you had a leaven starter! Passover and Unleavened Bread Instructions Exodus 12 Leviticus 23 Numbers 9 #UnleavenedBread #Passover #Leaven