XX (faithful ) Son of Zerah. ( 1 Chronicles 2:6 ; 1 Kings 4:31 ) Son of Joel and grandson of Samuel the prophet, a Kohathite. He is called "the singer," rather the musician, ( 1 Chronicles 6:33 ) and was the first of the three Levites to whom was committed the vocal and instrumental music of the temple service in the reign of David. ( 1 Chronicles 15:16-22 ) The 88th Psalm is ascribed to him. (B.C. 1014.)