Leviticus 2:4

When you bring a grain offering baked in the oven as an offering , it shall be unleavened loaves of fine flour mixed with oil or unleavened wafers smeared with oil .

“‘If you bring a grain offering baked in an oven, it is to consist of the finest flour: either thick loaves made without yeast and with olive oil mixed in or thin loaves made without yeast and brushed with olive oil.

And if thou bring an oblation of a meat offering baken in the oven, it shall be unleavened cakes of fine flour mingled with oil, or unleavened wafers anointed with oil.