Leviticus 5:12

5:12 He must bring it to the priest and the priest must scoop out from it a handful as its memorial portion and offer it up in smoke on the altar on top of the other gifts of the Lord – it is a sin offering.

Leviticus 6:15

6:15 and the priest must take up with his hand some of the choice wheat flour of the grain offering and some of its olive oil, and all of the frankincense that is on the grain offering, and he must offer its memorial portion up in smoke on the altar as a soothing aroma to the Lord.