Leviticus 2:2-3

2He must take it to Aaron's sons, the priests. The priest will take some of the flour and oil and all the incense in his hand. He will burn them on the altar as a gift to the Lord. The smell of them while they are burning will give the Lord pleasure.

3The flour that he did not burn is for the priests. It is very holy. That is because it is part of an offering to the Lord.