They shall turn the rivers far away; which is to be taken impersonally, as such expressions are very frequently, for, the rivers (those small rivulets by which the waters of Nilus were conveyed and distributed into several parts of the land) shall be turned far away, as they must needs be, when the greater river Nilus, which fed them, was dried up. The brooks of defence; the several branches of the river Nilus, which were a great defence to Egypt, as is well known. The reeds and flags; which were very useful to them for making their boats, which were absolutely necessary in that country, and divers other things. Shall wither; as they commonly do for want of water.
Related Commentaries of Isaiah 19:6
Isaiah 19:6
6 And they shall turn the rivers far away; and the brooks of defence shall be emptied and dried up: the reeds and flags shall wither.