hungry - not literally. Image from unappeasable hunger, to picture internal factions, reckless of the most tender ties (Isa 9:19), and insatiably spreading misery and death on every side (Jer 19:9).
eat - not literally, but destroy (Psa 27:2; Job 19:22).
flesh of ... arm - those nearest akin: their former support (helper) (Isa 32:2) [Maurer].