Easton's Bible Dictionary (1897)
Upright towards God, the head of the seventh division of Levitical musicians (1 Chr. 25:14).
Smith's Bible Dictionary (1863)
(right before God), son of Asaph, and head of the seventh of the twenty-four wards into which the musicians of the Levites were divided. (1 Chronicles 25:14) [Asarelah] (B.C. 1014).
Hastings' Dictionary of the Bible (1898) & Schaff's Bible Dictionary
JESHAR'ELAH (right toward God), the head of the seventh division of the Levite musicians. 1 Chr 25:14. In 1 Chr 25:2 he is called Asarelah.