Isaiah 18:2 Midrash

הַשֹּׁלֵ֨חַ בַּיָּ֜ם צִירִ֗ים וּבִכְלֵי־גֹמֶא֮ עַל־פְּנֵי־מַיִם֒ לְכ֣וּ ׀ מַלְאָכִ֣ים קַלִּ֗ים אֶל־גּוֹי֙ מְמֻשָּׁ֣ךְ וּמוֹרָ֔ט אֶל־עַ֥ם נוֹרָ֖א מִן־ה֣וּא וָהָ֑לְאָה גּ֚וֹי קַו־קָ֣ו וּמְבוּסָ֔ה אֲשֶׁר־בָּזְא֥וּ נְהָרִ֖ים אַרְצֽוֹ׃

That sendeth ambassadors by the sea, Even in vessels of papyrus upon the waters! Go, ye swift messengers, To a nation tall and of glossy skin, To a people terrible from their beginning onward; A nation that is sturdy and treadeth down, Whose land the rivers divide!

Read midrashic interpretation of Isaiah 18:2: and classical rabbinic exegesis.