Leviticus 7:12-13

12“ ‘If they offer it as an expression of thankfulness, then along with this thank offering they are to offer thick loaves made without yeast and with olive oil mixed in, thin loaves made without yeast and brushed with oil, and thick loaves of the finest flour well-kneaded and with oil mixed in.

13Along with their fellowship offering of thanksgiving they are to present an offering with thick loaves of bread made with yeast.