5. Rabbah--meaning "the Great," Ammon's metropolis. Under the Ptolemies it was rebuilt under the name Philadelphia; the ruins are called Amman now, but there is no dwelling inhabited.
      Ammonites--that is, the Ammonite region is to be a "couching place for flocks," namely of the Arabs. The "camels," being the chief beast of burden of the Chaldeans, are put first, as their invasion was to prepare the Ammonite land for the Arab "flocks." Instead of busy men, there shall be "still and couching flocks."

JFB.