Leviticus 7:11-13

“And this is the law of the sacrifice of peace offerings that one may offer to the LORD. If he offers it for a thanksgiving, then he shall offer with the thanksgiving sacrifice unleavened loaves mixed with oil, unleavened wafers smeared with oil, and loaves of fine flour well mixed with oil. With the sacrifice of his peace offerings for thanksgiving he shall bring his offering with loaves of leavened bread.