Then I will change the speech of the peoples into pure speech, that all of them will call on the name of the LORD and will serve him as one.
References for Zephaniah 3:9
From beyond the rivers of Cush, my daughter, my dispersed ones, will bring me offerings.
On that day, you won't be ashamed of all your deeds with which you sinned against me; then I will remove from your midst those boasting with pride. No longer will you be haughty on my holy mountain,
but I will cause a humble and powerless people to remain in your midst; they will seek refuge in the name of the LORD.
The few remaining from Israel won't commit injustice; they won't tell lies; a deceitful tongue won't be found on their lips. They will graze and lie down; no one will make them afraid.