THE PASSOVER LAMB WAS EATEN WITH UNLEAVENED BREAD

Exodus 12:5 Your lamb shall be without blemish, a male of the first year: ye shall take it out from the sheep, or from the goats:

Exodus 12:6 And ye shall keep it up until the fourteenth day of the same month: and the whole assembly of the congregation of Israel shall kill it in the evening.

Exodus 12:8 And they shall eat the flesh in that night, roast with fire, and unleavened bread; and with bitter herbs they shall eat it.