Commentary for Judges 7:12

וּמִדְיָ֨ן וַעֲמָלֵ֤ק וְכָל־בְּנֵי־קֶ֙דֶם֙ נֹפְלִ֣ים בָּעֵ֔מֶק כָּאַרְבֶּ֖ה לָרֹ֑ב וְלִגְמַלֵּיהֶם֙ אֵ֣ין מִסְפָּ֔ר כַּח֛וֹל שֶׁעַל־שְׂפַ֥ת הַיָּ֖ם לָרֹֽב׃

Now the Midianites and the Amalekites and all the children of the east lay along in the valley like locusts for multitude; and their camels were without number, as the sand which is upon the sea-shore for multitude.

Rashi on Judges