Leviticus 7:12-13

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.

13He must present this grain offering in addition to ring-shaped loaves of leavened bread which regularly accompany the sacrifice of his thanksgiving peace offering.