Albert Barnes' Notes on the Whole Bible - Job 31:21
If I have lifted up my hand against the fatherless - That is, if I have taken advantage of my rank, influence, and power, to oppress and injure him.When I saw my help in the gate - The gate of a city was a place of concourse; a place where debates were held, and where justice was administered. Job speaks here of that part of his life when he was clothed with authority as a magistrate, or when he had power and influence as a public man. He says that he had never abused this power to oppress the... read more
The Pulpit Commentary - Job 31:22
Then let mine arm (rather, my shoulder ) fall from my shoulder-blade . Job was, perhaps, led to make this rather strange imprecation by the fact that, in the disease from which he was suffering, portions of bone sometimes detach themselves and come away. And mine arm be broken from the bone . My forearm, i.e , detach itself from the bone of the upper arm, and come away from it. read more