Bread: Sometimes Unleavened
Source: TTT
Exodus 12:18
In the first month you are to eat unleavened bread, from the evening of the fourteenth day until the evening of the twenty-first day.
1 Corinthians 5:8
Therefore let us keep the feast, not with the old bread, leavened with malice and wickedness, but with the unleavened bread of sincerity and of truth.