Ezekiel 39:27-28

When I bring them back from the nations and gather them out of their enemies’ lands, then I shall show Myself holy [and My justice and holiness will be vindicated] through them in the sight of many nations. Then they will know [without any doubt] that I am the LORD their God because I made them go into exile among the nations, and then gathered them to their own land. I will leave none of them there [among the nations] any longer.