Leviticus 7:10-12

10Every grain offering, whether mixed with olive oil or dry, belongs to all the sons of Aaron, each one alike.

11“‘This is the law of the peace offering sacrifice which he is to present to the Lord.

12If he presents it on account of thanksgiving, along with the thank offering sacrifice he must present unleavened loaves mixed with olive oil, unleavened wafers smeared with olive oil, and well soaked ring-shaped loaves made of choice wheat flour mixed with olive oil.