Albert Barnes' Notes on the Whole Bible - Job 31:22
Then let mine arm - The strong language which Job uses here, shows his consciousness of innocence, and his detestation of the offences to which he here refers, Job 31:16-22. The word rendered “arm” here (כתף kâthêph) means properly the shoulder. Isaiah 46:7; Isaiah 49:22; Numbers 7:9; compare the notes at Isaiah 11:14. There is no instance, it is believed, unless this is one, in which it means arm, and the meaning here is, that he wished, if he had been guilty, his shoulder might separate... read more
The Pulpit Commentary - Job 31:23
For destruction from God was a terror to me . I could not, i.e; have acted in the way charged against me by Eliphaz, since I was always God-fearing, and should have been deterred, if by nothing else, at any rate by dread of the Divine vengeance. And by reason of his highness I could not endure . God's majesty and excellency are such that I could not have had the face to resist them. If! had begun such a course of life as Eliphaz laid to my charge ( Job 22:5-9 ), I could not have... read more