Exodus 12:8
8 They shall eat the flesh that night, roasted on the fire; with kunleavened bread and bitter herbs they shall eat it.
Exodus 34:25
25 n“You shall not offer the blood of my sacrifice with anything leavened, oor let the sacrifice of the Feast of the Passover remain until the morning.
Leviticus 2:11
11 “No grain offering that you bring to the Lord shall be made with aleaven, for you shall burn no leaven nor any honey as a food offering to the Lord.