Komentaryong Sumisipi para sa Isaias 19:7

.והנה מן היאור עולות שבע פרות , “and here seven cows were climbing out of the river.” Egypt’s economic base was the river Nile; it provided the key to its food supply. Isaiah 19,7 already commented on this when he said: “bed-rock will be exposed by the river Nile (as a result of drought and its failure to overflow), everything sown by the Nile will wither and blow away, etc.” Isaiah continues: “the fishermen shall lament and all who cast lines shall mourn. The flax workers too shall be dismayed. Her foundation (Egypt’s) shall be crushed, etc.”

and to the wall they attached their shields (עֵרָה). Comp. (above 19:7) “The well rooted plants (עָרוֹת) by the stream,” (Psalms 37:35) “Striking roots (מִתְעָרֶה) like a green tree in its native soil.” It is also possible to explain: וְקִיר עֵרָה מָגֵן as follows: Kir is the name of the city. Comp. (II Kings 16:9) “And exiled [its inhabitants] to Kir.” The people of that province exposed their shields toward Jerusalem.

ערות, places where the walls were breached, areas from which it would be relatively easy to invade the country. The word ערוה is used in this sense in Chabakuk 3,13 ערות יסוד, “revealing its very foundations.” Another verse in which the word ערוה appears in a similar sense as here is Psalms 137,7 ערו ערו עד היסוד, as well as Isaiah 19,7 ערות על היאור”whatever is by the side of the Nile will be blown away, will vanish.” The fact that all the brothers were of exceptional build, always went everywhere together, made them distinctly different from other travelers so that Joseph pointed to that fact as being suspicious and accused them of being spies.

well-rooted Heb. ומתערה, rooted, as (in Isa. 19:7): “the well-rooted plants (ערות) by the stream.” In the language of the Mishnah there are many [examples]: e.g. (Oktzin 3:8): “A tree that was cut off but is yet rooted by its bark.”