Leviticus 2:14-16

14And if thou offer a grain offering of thy firstfruits unto Yhwh, thou shalt offer for the grain offering of thy firstfruits green heads of grain dried by the fire, even barley beaten out of full heads.

15And thou shalt put oil upon it, and lay frankincense thereon: it is a grain offering.

16And the priest shall burn the memorial of it, part of the beaten grain thereof, and part of the oil thereof, with all the frankincense thereof: it is an offering made by fire unto Yhwh.