12 And it shall come to pass, when seventy years are accomplished, that I will punish punish: Heb. visit upon the king of Babylon, and that nation, saith the Lord, for their iniquity, and the land of the Chaldeans, and will make it perpetual desolations.
English Standard Version
12 Then after seventy years are completed, I will punish the king of Babylon and that nation, the land of the Chaldeans, for their iniquity, declares the Lord, making the land an everlasting waste.
12 "Once the seventy years is up, I'll punish the king of Babylon and the whole nation of Babylon for their sin. Then they'll be the wasteland.
New King James Version
12 'Then it will come to pass, when seventy years are completed, that I will punish the king of Babylon and that nation, the land of the Chaldeans, for their iniquity,' says the Lord; 'and I will make it a perpetual desolation.
New Living Translation
12 "Then, after the seventy years of captivity are over, I will punish the king of Babylon and his people for their sins," says the Lord . "I will make the country of the Babylonians a wasteland forever.
The fixing of the time during which the Jewish captivity should last, would not only confirm the prophecy, but also comfort the people of God, and encourage faith and prayer. The ruin of Babylon is foretold: the rod will be thrown into the fire when the correcting work is done. When the set time to favour Zion is come, Babylon shall be punished for their iniquity, as other nations have been punished for their sins. Every threatening of the Scripture will certainly be accomplished.