Isaiah 23:3

(3) By great waters the seed of Sihor . . .—Sihor (“the dark river”) is as in Jeremiah 2:18, a Hebrew name for the Nile. The corn-trade with Egypt (Ezekiel 27:7, adds the linen-trade) was naturally a chief branch of Tyrian commerce. Practically, indeed, as the Egyptians had no timber to build ships, and, for the most part, hated the sea, their navy consisted of Phœnicians. Tyre practically reaped the harvest that sprang from the inundation of the Nile. For “mart,” read gain. The “great waters” are those of the great sea, i.e., of the Mediterranean.