Leviticus 2:2-3

²and take it to Aaron's sons the priests. The priest shall take a handful of the flour and olive oil mixture, as well as all the frankincense, and burn this as a ‘reminder part’ on the altar, a food offering, to be accepted by the Lord.

³The rest of the grain offering is for Aaron and his sons; it is a most holy part of the offerings given to the Lord as food offerings.