Exodus 23:18
"You are not to offer the blood of my sacrifice with anything leavened, and you are not to let the fat portion of my sacrifice remain overnight until morning.
Exodus 34:25
"You are not to offer the blood of my sacrifice with anything leavened, nor are you to allow the sacrifice of the Festival of Passover to remain until morning.
Leviticus 2:11
"Any grain offering that you bring to the LORD is not to be prepared with yeast, because anything with leaven and honey may not be offered in smoke as an offering by fire to the LORD.
Deuteronomy 16:4
Yeast is not to be seen in any of your territories for seven days. The meat is not to remain from the evening of the first day until morning.
Exodus 12:8
That very night they're to eat the meat, roasted over the fire, with unleavened bread and bitter herbs.
Exodus 12:10
Don't leave any of it until morning, and whatever does remain of it until morning you are to burn in the fire.
Exodus 12:15
You are to eat unleavened bread for seven days. On the first day be sure to remove all the leaven from your houses, because any person who eats anything leavened from the first day until the seventh will be cut off from Israel.
Leviticus 7:15
As to the meat contained in his peace offerings, it is to be eaten on the day it is offered. Nothing of it is to remain until morning."
Leviticus 7:12
If someone brings it to demonstrate thanksgiving, then he is to present along with the thanksgiving offering unleavened cakes mixed with olive oil, unleavened wafers spread with olive oil, and cakes of mixed fine flour with olive oil.