19 So those who made melody, Heman, Asaph, and Ethan, were put in position, with brass instruments, sounding loudly; 20 And Zechariah and Aziel and Shemiramoth and Jehiel, Unni and Eliab and Maaseiah and Benaiah, with corded instruments put to Alamoth. 21 And Mattithiah and Eliphelehu and Mikneiah and Obed-edom and Jeiel and Azaziah, with corded instruments on the octave, to give the first note of the song.

Matthew Henry's Commentary on 1 Chronicles 15:19-21

Commentary on 1 Chronicles 15:1-24

(Read 1 Chronicles 15:1-24)

Wise and good men may be guilty of oversights, which they will correct, as soon as they are aware of them. David does not try to justify what had been done amiss, nor to lay the blame on others; but he owns himself guilty, with others, of not seeking God in due order