And their coast was from Aroer that [is] on the bank of the
 river Arnon
 As the country of Sihon is described, ( Joshua 13:9 ) ; from whence it appears that it was his country which was given to Reuben, though not all of it: 
 and the city that [is] in the midst of the river;
 (See Gill on Joshua 13:9); 
 and all the plain by Medeba;
 which reached unto Dibon, ( Joshua 13:9 ) .