Isaiah 34:2

The first reason (cf. Isaiah 34:5-6; Isaiah 34:8) everyone should listen is that the Lord is very angry with the nations. He has determined to devote them to destruction, to put them under the ban (Heb. herem; cf. Isaiah 11:15; Joshua 6:21; 1 Samuel 15:3).

"In the Hebrew setting at least two implications [of the ban] are significant: spoils are devoted to God to show that God alone has won a battle (Jericho); when a nation has deliberately blocked the flow of God’s love to the world, it forfeits itself into God’s hands (Amalek)." [Note: Oswalt, p. 608.]

What humankind must hear, then, is a sentence of judgment on the whole earth (cf. Psalms 2:9).