Leviticus 2:1-2

1“‘When a person presents a grain offering to the Lord, his offering must consist of choice wheat flour, and he must pour olive oil on it and put frankincense on it.

2Then he must bring it to the sons of Aaron, the priests, and the priest must scoop out from there a handful of its choice wheat flour and some of its olive oil in addition to all of its frankincense, and the priest must offer its memorial portion up in smoke on the altar – it is a gift of a soothing aroma to the Lord.