1 Chronicles 25:21 records that the fourteenth group of musicians appointed for temple service was led by Mattithiah, and this group consisted of Mattithiah himself, his sons, and his brothers, totaling twelve people. This verse is part of a list detailing the organization of the temple musicians into groups for their duties.
The book of 1 Chronicles was written to document the organization of Israel’s worship under King David. In this chapter, David and the leaders are assigning specific families to serve in the temple’s music ministry. Each group, including Mattithiah’s, had twelve members, showing a structured and shared responsibility among the Levites for leading worship.