Deuteronomy 16:4
And see that there be no leavened bread seen in all thy coasts seven days long, and that there remain nothing of the flesh which thou hast offered the first day at evening, until the morning.
Exodus 12:10
And see that ye let nothing of it remain unto the morning: if ought remain, burn it with fire.
Exodus 34:25
"Thou shalt not offer the blood of my sacrifice with leavened bread: neither shall ought of the sacrifice of the feast of Passover, be left unto the morning.
Exodus 13:7
Therefore thou shalt eat sweet bread seven days, and see that there be no leavened bread seen nor yet leaven among you in all your quarters.
Exodus 12:15
Seven days shall ye eat unleavened bread, so that even the first day ye shall put away leaven out of your houses. For whosoever eateth leavened bread from the first day until the seventh day, that soul shall be plucked out from Israel.
Exodus 12:8
And they shall eat the flesh the same night, roast with fire, and with unleavened bread, and with sour herbs they shall eat it.