Jeremiah's at-Bash of Kaldiah

The prophecy of Jeremiah ends with an extended series of prophecies against the nation of Babylon. Throughout the book Babylon has been the great threat from the north that is going to come upon Judah and the rest of the nations of the region. The Lord will be behind the judgment upon Babylon, just as he will bebehind the judgment upon Judah. Leb K. Mai mentioned in verse 1 is an at-bash of Kaldiah. An at-bash is a sort of code by which the first letter of the alphabet is replaced by the last. There is another instance of this in verse 41 where Babylon is spoken of a shishag.