Charles H. Spurgeon on Psalms 110:6

He shall judge among the heathen, or, among the nations. All nations shall feel his power, and either yield to it joyfully or be crushed before it. He shall fill the places with the dead bodies. In the terrible battles of his gospel all opponents shall fall till the field of fight is heaped high with the slain. This need not be understood literally, but as a poetical description of the overthrow of all rebellious powers and the defeat of all unholy principles. Yet should kings oppose the Lord with weapons of war, the result would be their overwhelming defeat and the entire destruction of their forces. Read in connection with this prophecy the passage which begins at the seventeenth verse of Re 19:1 and runs on to the end of the chapter. Terrible things in righteousness will be seen ere the history of this world comes to an end. He shall wound the heads over many countries. He will strike at the greatest powers which resist him, and wound not merely common men, but those who rule and reign. If the nations will not have Christ for their Head, they shall find their political heads to be powerless to protect them. Or the passage may be read, "he has smitten the head over the wide earth." The monarch of the greatest nation shall not be able to escape the sword of the Lord; nor shall that dread spiritual prince who rules over the children of disobedience be able to escape without a deadly wound. Pope and priest must fall, with Mahomet and other deceivers who are now heads of the people. Jesus must reign and they must perish.