Asaph
: father of Joah, Hezekiah's recorder,son of Berechiah the Levite; music minister under David,father of Zichri; a Levite ancestor of some returnees,an official over the (Persian) king's forest in Judah
Selah
: a musical notation for crescendo or emphasis by action (IBD) (30° 19´, 35° 27´)
Psalms 138:1
David
: a son of Jesse of Judah; king of Israel,son of Jesse of Judah; king of Israel