1 Chronicles 9:29-34

9:29 Some of them were in charge of the equipment and articles of the sanctuary, as well as the flour, wine, olive oil, incense, and spices. 9:30 (But some of the priests mixed the spices.) 9:31 Mattithiah, a Levite, the firstborn son of Shallum the Korahite, was in charge of baking the bread for offerings. 9:32 Some of the Kohathites, their relatives, were in charge of preparing the bread that is displayed each Sabbath.

9:33 The musicians and Levite family leaders stayed in rooms at the sanctuary and were exempt from other duties, for day and night they had to carry out their assigned tasks. 9:34 These were the family leaders of the Levites, as listed in their genealogical records. They lived in Jerusalem.

Leviticus 6:20-23

6:20 “This is the offering of Aaron and his sons which they must present to the Lord on the day when he is anointed: a tenth of an ephah of choice wheat flour as a continual grain offering, half of it in the morning and half of it in the evening. 6:21 It must be made with olive oil on a griddle and you must bring it well soaked, so you must present a grain offering of broken pieces as a soothing aroma to the Lord. 6:22 The high priest who succeeds him from among his sons must do it. It is a perpetual statute; it must be offered up in smoke as a whole offering to the Lord. 6:23 Every grain offering of a priest must be a whole offering; it must not be eaten.”