1 Chronicles 25:23

The sixteenth to Hananiah, he, his sons, and his brethren, were twelve:

The verse is part of David's careful organization of the worship of Israel. It records the sixteenth course of temple musicians, which was assigned to Hananiah. He served together with his sons and his brethren, forming a group of twelve. These musical courses were led by men specially instructed and skilled in playing instruments.