Deuteronomy 16:4
And there shall be no leavened bread seen with thee in all thy borders seven days; neither shall there any thing of the flesh, which thou didst sacrifice the first day at evening, remain all night until the morning.
Exodus 12:10
And ye shall let nothing of it remain till the morning: and that which remaineth of it till the morning ye shall burn with fire.
Exodus 34:25
Thou shalt not offer the blood of my sacrifice with leaven, neither shall the sacrifice of the feast of the passover be left until the morning.
Exodus 13:7
Unleavened bread shall be eaten seven days: and there shall no leavened bread be seen with thee, neither shall there be leaven seen with thee in all thy quarters.
Exodus 12:15
Seven days shall ye eat unleavened bread; even the first day ye shall put away leaven out of your houses: for whoever eateth leavened bread, from the first day till the seventh day, that soul shall be cut off from Israel.
Exodus 12:8
And they shall eat the flesh in that night, roasted with fire; and unleavened bread, and with bitter herbs they shall eat it.