Deuteronomy 16:4
No yeast shall be seen with you in all your borders seven days; neither shall any of the flesh, which you sacrifice the first day at evening, remain all night until the morning.
Exodus 12:10
You shall let nothing of it remain until the morning; but that which remains of it until the morning you shall burn with fire.
Exodus 34:25
"You shall not offer the blood of my sacrifice with leavened bread; neither shall the sacrifice of the feast of the Passover be left to the morning.
Exodus 13:7
Unleavened bread shall be eaten throughout the seven days; and no leavened bread shall be seen with you, neither shall there be yeast seen with you, in all your borders.
Exodus 12:15
"'Seven days you shall eat unleavened bread; even the first day you shall put away yeast out of your houses, for whoever eats leavened bread from the first day until the seventh day, that soul shall be cut off from Israel.
Exodus 12:8
They shall eat the flesh in that night, roasted with fire, and unleavened bread. They shall eat it with bitter herbs.