וְאָנוּ֙ הַדַּיָּגִ֔ים וְאָ֣בְל֔וּ כָּל־מַשְׁלִיכֵ֥י בַיְא֖וֹר חַכָּ֑ה וּפֹרְשֵׂ֥י מִכְמֹ֛רֶת עַל־פְּנֵי־מַ֖יִם אֻמְלָֽלוּ׃
The fishers also shall lament, and all they that cast angle into the Nile shall mourn, and they that spread nets upon the waters shall languish.
Read halakhic rulings (Jewish law) on Isaiah 19:8: and classical halakhic sources.