Jamieson, Fausset and Brown on Isaiah 23:3

3. great waters--the wide waters of the sea.

seed--"grain," or crop, as in 1Sa 8:15; Job 39:12.

Sihor--literally, "dark-colored"; applied to the Nile, as the Egyptian Jeor, and the Greek Melas, to express the "dark, turbid" colors given to its waters by the fertilizing soil which it deposits at its yearly overflow (Jr 2:18).

harvest of the river--the growth of the Delta; the produce due to the overflow of the Nile: Egypt was the great granary of corn in the ancient world (Ge 41:1-57; 42:1-38; 43:1-34).

her revenue--Tyrian vessels carried Egyptian produce obtained in exchange for wine, oil, glass, &c., into various lands, and so made large profits.

mart--(Eze 27:3). No city was more favorably situated for commerce.