Two verses in the Bible (NIV) comes to mind when one day all nations will worship the Almighty God

Psalm 22:27 All the ends of the earth will remember and turn to the Lord, and all the families of the nations will bow down before him, for dominion belongs to the LORD and he rules over the nations

Zephaniah 2:11 The Lord will be awesome to them when he destroys all the gods of the land. The nations on every shore will worship him, every one in its own land.