Deuteronomy 16:4
There must not be a scrap of yeast within your land for seven days, nor can any of the meat you sacrifice on the evening of the first day remain until the next morning.
Exodus 12:10
You must leave nothing until morning, but you must burn with fire whatever remains of it until morning.
Exodus 34:25
"You must not offer the blood of my sacrifice with yeast; the sacrifice from the feast of Passover must not remain until the following morning.
Exodus 13:7
Bread made without yeast must be eaten for seven days; no bread made with yeast shall be seen among you, and you must have no yeast among you within any of your borders.
Exodus 12:15
For seven days you must eat bread made without yeast. Surely on the first day you must put away yeast from your houses because anyone who eats bread made with yeast from the first day to the seventh day will be cut off from Israel.
Exodus 12:8
They will eat the meat the same night; they will eat it roasted over the fire with bread made without yeast and with bitter herbs.