1 Chronicles 9:29-33

Some of them also were appointed over the furniture and over all the utensils of the sanctuary, and over the finely milled flour, the wine, the olive oil, the frankincense, and the balsam oil.

Some of the sons of the priests prepared the mixing of the balsam oil.

Mattithiah, one of the Levites, who was the firstborn of Shallum the Korahite, had the responsibility for the baking of cakes in pans.

Some of their relatives of the sons of the Kohathites were in charge of the showbread to prepare it every Sabbath.

Now these are the singers, heads of fathers’ households of the Levites, who lived in the chambers of the temple free of other duties; for they were engaged in their work day and night.