Leaven (Yeast): Leavened Bread Forbidden with Meat offerings
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Leviticus 2:11
No grain offering that you present to the LORD may be made with leaven, for you are not to burn any leaven or honey as an offering made by fire to the LORD.
Leviticus 6:17
It must not be baked with leaven; I have assigned it as their portion of My offerings made by fire. It is most holy, like the sin offering and the guilt offering.
Leviticus 10:12
And Moses said to Aaron and his remaining sons, Eleazar and Ithamar, “Take the grain offering that remains from the offerings made by fire to the LORD and eat it without leaven beside the altar, because it is most holy.
Exodus 23:18
You must not offer the blood of My sacrifices with anything leavened, nor may the fat of My feast remain until morning.
Exodus 34:25
Do not offer the blood of a sacrifice to Me along with anything leavened, and do not let any of the sacrifice from the Passover Feast remain until morning.