Exodus 29:2
along with unleavened bread, unleavened cakes mixed with oil, and unleavened wafers anointed with oil. Make them out of fine wheat flour,

Leviticus 6:18
Any male among the sons of Aaron may eat it. This is a permanent portion from the offerings made by fire to the LORD for the generations to come. Anything that touches them shall become holy."

Leviticus 6:20
"This is the offering that Aaron and his sons must present to the LORD on the day he is anointed: a tenth of an ephah of fine flour as a regular grain offering, half of it in the morning and half in the evening.