Matthew Poole and continuators on Ezekiel 21:20

20 Appoint a way, that the sword may come to Rabbath of the Ammonites , and to Judah in Jerusalem the defenced.

This Royal City of the Ammonites, it seems, the King of Babylon had a quarrel with, as well, as with Ierusalem, and he was resolved, when he came out of Babylon, to set upon one of them. There were two or three Cities of this name Rabba, or Rabbath, one in the Tribe of Iudah, one in Issachar, one in Moab, but this in the Text is distinguisht by Rabbath of the Ammonites.

They were the Children of Lots daughter by incestuous mixture.

i. e. The Jews, the Land for the people of the Land.

Particularly against Ierusalem.

Whose Fortifications do now as little discourage, as they shall ere long hinder Nebuchadnezzar from taking the City and destroying it.