1 Chronicles 9:31-33

New Catholic Bible

³¹ There was a certain Levite, Mattithiah, the firstborn of Shallum the Korahite, who was responsible for the baking of the bread. ³² Some of the Korahites, their brethren, were in charge of preparing the shewbread every Sabbath.

³³ Those who were singers, the leaders of their ancestral clans of Levites, would stay in the chambers. They were free from other responsibilities, for they were busy working day and night.