75  Probably David wrote this psalm, at his coming to the crown, after the death of Saul, and delivered it to that Asaph, who was chief of the musicians. Herein he thanks God for bringing him to the throne, checks the insolence of his enemies, owns the sovereignty of God in all affairs, and promised to lay himself out for the public good. To the chief musician, Al - taschith, A psalm or song of Asaph.
 
Title of the psalm. Asaph - This psalm seems to relate to the time when David had entered upon, but not got full possession of the kingdom.

75:9 Declare - The praises of God.