Then they will know that I am the LORD their God, when I regather them to their own land, not leaving any of them behind after their exile among the nations.
KJV
Then shall they know that I [am] the LORD their God, which caused them to be led into captivity among the heathen: but I have gathered them unto their own land, and have left none of them any more there.
ASV
And they shall know that I am Jehovah their God, in that I caused them to go into captivity among the nations, and have gathered them unto their own land; and I will leave none of them any more there;