Meat-Offerings: No Leaven Used With
Source: TTT
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.