My right and my cause That is, my righteous cause against thy and my enemies. Thou sattest in the throne, &c. Thou didst judge and give sentence for me. Thou hast rebuked That is, punished or destroyed, as it is explained in the next clause; the heathen Namely, the Philistines and other heathen nations who, from time to time, molested David and the people of Israel. Thou hast put out their name for ever Meaning either that fame and honour which they had gained by their former exploits, but had now utterly lost by their shameful defeats; or their very memorial, as it fared with Amalek.
Related Commentaries of Psalms 9:4
Psalms 9:4-5
4 For thou hast maintaineda my right and my cause; thou satest in the throne judging right.
5 Thou hast rebuked the heathen, thou hast destroyed the wicked, thou hast put out their name for ever and ever.