Leviticus 2:2-3

2:2 Then 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. 2:3 The remainder of the grain offering belongs to Aaron and to his sons – it is most holy from the gifts of the Lord.