But do thou for me - While they use horrible imprecations against me, and load me with their curses, act thou for me, and deliver me from their maledictions. While they curse, do thou bless. This verse is a farther proof of the correctness of the interpretation given above.
But do thou for me, O God the Lord, for thy name‘s sake - That is, Interpose for me; exert thy power in my behalf. The phrase “for thy name‘s sake” implies that the motive which prompted him was a desire that God might be honored. It was not primarily or mainly for his own happiness; it was that God might be glorified, that his character might be illustrated, that his plans might be accomplished. Compare the notes at Daniel 9:18-19.
Because thy mercy is good - That is, It is the characteristic of mercy to do good; to show kindness.
Deliver thou me - He prays that God would “manifest” himself as he really was, as a God of mercy.