Render to them their desert— Their own rendering; as they have rendered to others. This verse would be translated better in the future: Thou wilt give them, &c. See the next verse.
Related Commentaries of Psalms 28:4
Psalms 28:4
4 Give them according to their deeds, and according to the wickedness of their endeavours: give them after the work of their hands; render to them their desert.