Leviticus 6:16-18

16Aaron and his sons may eat the rest of the flour, but it must be baked without yeast and eaten in a sacred place within the courtyard of the Tabernacle.

17Remember, it must never be prepared with yeast. I have given it to the priests as their share of the special gifts presented to me. Like the sin offering and the guilt offering, it is most holy.

18Any of Aaron’s male descendants may eat from the special gifts presented to the Lord. This is their permanent right from generation to generation. Anyone or anything that touches these offerings will become holy.”