Albert Barnes Commentary Psalms 83:2

"For, lo, thine enemies make a tumult; And they that hate thee have lifted up the head." — Psalms 83:2 (ASV)

For, lo, thine enemies make a tumult - They are excited, aroused, and moving in a wild, furious, tumultuous manner, rushing on to accomplish their designs. They come like rolling waves of the sea. See the word used here explained in the notes at Psalm 2:1, where it is rendered in the text as “rage,” and in the margin as “tumultuously assemble.”

And they that hate thee - Your enemies; the enemies of your cause and your people. Who they were is specified in Psalm 83:6-8.

Have lifted up the head - They have become proud, bold, and confident of success, all of which is indicated by the phrase “lifted up the head.” The head is bowed down in penitence and trouble; pride lifts it up. Boldness, confidence, and wickedness are indicated by its being lifted up in this way.