Leviticus 2:14-16

14“If you present a grain offering of firstfruits to the Lord, you are to present fresh heads of grain, crushed kernels, roasted on the fire, for your grain offering of firstfruits.

15You are to put oil and frankincense on it; it is a grain offering.

16The priest will then burn some of its crushed kernels and oil with all its frankincense as a food offering to the Lord.