וּבְמַ֤יִם רַבִּים֙ זֶ֣רַע שִׁחֹ֔ר קְצִ֥יר יְא֖וֹר תְּבֽוּאָתָ֑הּ וַתְּהִ֖י סְחַ֥ר גּוֹיִֽם׃
Du, hart am Meere, bekamst früher die Saat des Nils, die Ernte des Stromes [Nil], du warst der Marktplatz der Völker.
Rashi on Isaiah
And on great waters the seed would come from Egypt, that is situated on the river Shihor, to Tyre.
Ibn Ezra on Isaiah
And by great waters, etc. The merchants brought to Tyre the seed of the Sihor,5Sihor (שיחור) is another name for the Nile (יאֹר); lit., the black river. The Nile is used here by metonymy for Egypt.5Sihor (שיחור) is another name for the Nile (יאֹר); lit., the black river. The Nile is used here by metonymy for Egypt. and her increase was the harvest of the Nile.
Rashi on Isaiah
the harvest of the Nile Egypt was the revenue of Tyre.