Leviticus 2:1,2 "When anyone offers a grain offering to the Lord, his offering shall be of fine flour. And he shall pour oil on it, and put frankincense on it.He shall bring it to Aaron’s sons, the priests, one of whom shall take from it his handful of fine flour and oil with all the frankincense. And the priest shall burn it as a memorial on the altar, an offering made by fire, a sweet aroma to the Lord."