13. brethren--nearest kinsmen, as distinguished from "acquaintance." So "kinsfolk" and "familiar friends" (Job 19:14) correspond in parallelism. The Arabic proverb is, "The brother, that is, the true friend, is only known in time of need."
      estranged--literally, "turn away with disgust." Job again unconsciously uses language prefiguring the desertion of Jesus Christ (Job 16:10; Lu 23:49; Ps 38:11).

JFB.