Ironical exhortation, as in Jer 46:3. The Egyptians, owing to the heat of their climate and abstinence from animal food, were physically weak, and therefore employed mercenary soldiers.
Ethiopians - Hebrew, Cush: Abyssinia and Nubia.
Libyans - Phut, Mauritania, west of Egypt (compare Gen 10:6).
shield - The Libyans borrowed from Egypt the use of the long shield extending to the feet [Xenophon, Cyropaedia, 6 and 7].
Lydians - not the Lydians west of Asia Minor (Gen 10:22; Eze 30:5), but the Ludim, an African nation descended from Egypt (Mizraim) (Gen 10:13; Eze 30:5; Nah 3:9).
handle and bend the bow - The employment of two verbs expresses the manner of bending the bow, namely, the foot being pressed on the center, and the hands holding the ends of it.