Where else does the Lord speak of gathering the nations for judgment?
Zephaniah 3:8 (ESV)
8“Therefore wait for me,” declares the LORD, “for the day when I rise up to seize the prey. For my decision is to gather nations, to assemble kingdoms, to pour out upon them my indignation, all my burning anger; for in the fire of my jealousy all the earth shall be consumed.
The Lord speaks of summoning all nations before him in passages such as Psalm 96:13 and Ecclesiastes 3:17.
8 “Therefore wait for me,” declares the LORD, “for the day when I rise up to seize the prey. For my decision is to gather nations, to assemble kingdoms, to pour out upon them my indignation, all my burning anger; for in the fire of my jealousy all the earth shall be consumed.