John Trapp on Psalms 28:4

Verſ. 4. Give them according to their deeds] God loveth to retaliate; and David out of a publick and prophetick ſpirit (not from private revenge, or troubled affectious) taketh thus upon him to imprecate,

And according to the wickedneſſe of their endeavours] They were therefore old habituated irreclaimable ſinners whom he thus curſed, And againſt ſuch, this and ſuch like imprecations are ſtill in force.

Give them after the works of their hands] Becauſe they regard not the works of thine hands, Verſ. 5. Par pari, ſaith Aben-Ezra here.