Sin in Passover & Feast of Unleavened Bread? – MTTCOG 7

If leaven represents sin, where do we find sin in the "Shadow" of God's Feast Ceremonial system and the "Example" of Israel?
Message Notes: https://makechristyouraim.org/message-to-the-churches-of-god-7-sin-in-passover-feast-of-unleavened-bread/