When they took hold of thee by thy hand, thou didst break, and rend all their shoulder: and when they leaned upon thee, thou brakest, and madest all their loins to be at a stand.
When they took hold of thee by thy hand - or handle of the reed.
Thou didst break, and rend all their shoulder - by the splinters on which the shoulder or arm would fall, on the support failing the hand.
Thou brakest, and madest all their loins to be at a stand - i:e., thou madest them to be disabled. Maurer somewhat similarly (referring to a kindred Arabic form), 'thou hast stricken both their loins.' Fairbairn, not so well, 'thou lettest all their loins stand,' i:e., by themselves, bereft of the support which they looked for from thee.