1 Chronicles 6:39

“his brother Asaph--They were brothers naturally, both being descended from Levi, as well as officially, both being of the Levitical order.”

“The genealogies of David’s three chief singers, Heman, Asaph, and Ethan or Jeduthun. 1 Chronicles 6:32 They waited on their office - On the establishment and continuance of the choral service in the temple, see 2 Chronicles 5:12, 2 Chronicles 29:27-30; 2 Chronicles 35:15. 1 Chronicles 6:33 Heman - In general Asaph takes precedence of Heman and Jeduthun, but here Heman is placed first, because his family, that of the Kohathites, had the highest priestly rank, being the family which furnished the high priests (see 1 Chronicles 6:2-15). Shemuel - i. e. “Samuel.” Our translators have here given the Hebrew, while elsewhere they give uniformlv the Greek, form of the name. We learn by this…”

“6:39 Asaph wrote several psalms (Pss 50; 73–83).”

“his brother: Asaph is probably called his brother, because he was of the same tribe as Heman; or, perhaps, because he was his companion or associate. Asaph: Ch1 15:17-19, Ch1 16:7, Ch1 25:2, Ch1 26:1; Ch2 5:12, Ch2 20:14, Ch2 29:13, Ch2 29:30; Ch2 35:15; Ezr 2:41, Ezr 3:10; Neh 7:44, Neh 11:17, Neh 11:22, Neh 12:35, Neh 12:46; Psa 50:1, Psa 73:1, Psa 74:1, Psa 75:1, Psa 76:1, Psa 77:1, Psa 78:1, Psa 79:1, Psa 80:1 \*titles Psa 81:1, Psa 82:1, Psa 83:1 \*titles 1 Chronicles 6:40”