Leviticus 6:17-20

17 aIt shall not be baked with leaven. bI have given it as their portion of my food offerings. cIt is a thing most holy, like the sin offering and the guilt offering. 18Every male among the children of Aaron may eat of it, as decreed forever throughout your generations, from the Lord’s food offerings. Whatever touches them shall become holy.”

19The Lord spoke to Moses, saying, 20 d“This is the offering that Aaron and his sons shall offer to the Lord on the day when he is anointed: a etenth of an ephah
An  ephah was about 3/5 bushel or 22 liters
of fine flour as a regular grain offering, half of it in the morning and half in the evening.
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