"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.
Jeremiah 25:12
Surrounding context
25:11 And this whole land shall be a desolation and an astonishment, and these nations shall serve the king of Babylon seventy years.
25:12 "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.
25:13 So I will bring on that land all My words which I have pronounced against it, all that is written in this book, which Jeremiah has prophesied concerning all the nations.