Joshua 13:16

their coast Observe the use of the word "coast" here, without any allusion to the seaboard. The word comes from the Latin costa= "a rib," "side," through the Fr. "coste." Hence it = "a border" generally, though now applied to the sea-coast only. Comp. "Bethlehem and in all the coaststhereof" (Matthew 2:16); "the coasts of Judæa" (Matthew 19:1); the coastsof Gadara (Mark 5:17); "the coasts" of Antioch in Pisidia (Acts 13:50). The portion of country this tribe selected, under its modern name of the Belka, is still esteemed beyond all others by the Arab sheepmasters. It was the southernmost and smallest portion of the district east of the Jordan.

from Aroer See above, ch. Joshua 12:2; all the plain by Medeba= the plateau east of Abarim or mount Pisgah. See above, Joshua 12:3.

the city that is in the midst = Ar of Moab, as above, Joshua 13:9.