Leviticus 2:2, 9
and bring it to Aaron's sons the priests. The priest shall take a handful of the flour and oil, together with all the frankincense, and burn this as a memorial portion on the altar, an offering made by fire, a pleasing aroma to the LORD. . . .

Leviticus 5:12
He is to bring it to the priest, who shall take a handful from it as a memorial portion and burn it on the altar atop the offerings made by fire to the LORD; it is a sin offering.

Leviticus 6:15
The priest is to remove a handful of fine flour and olive oil, together with all the incense from the grain offering, and burn the memorial portion on the altar as a pleasing aroma to the LORD.