Leviticus 6:16-17

6:16 Aaron and his sons are to eat what is left over from it. It must be eaten unleavened in a holy place; they are to eat it in the courtyard of the Meeting Tent. 6:17 It must not be baked with yeast. I have given it as their portion from my gifts. It is most holy, like the sin offering and the guilt offering.

Leviticus 2:10

2:10 The remainder of the grain offering belongs to Aaron and to his sons – it is most holy from the gifts of the Lord.