Leviticus 2:2-3

2and bring it to Aaron’s sons, the priests. The priest will scoop out a handful of the flour moistened with oil, together with all the frankincense, and burn this representative portion on the altar. It is a special gift, a pleasing aroma to the Lord.

3The rest of the grain offering will then be given to Aaron and his sons. This offering will be considered a most holy part of the special gifts presented to the Lord.