John Gill's Exposition of the Whole Bible
Job 31:10
[Then] let my wife grind unto another,.... Which some understand literally, of her being put to the worst of drudgery and slavery, to work at a mill, and grind corn for the service of a stranger, and be exposed to the company of the meanest of persons, and to their insults and abuses; as we find such as were taken captives and made prisoners by an enemy were put unto, as Samson, Judges 16:21; and it may be observed, that to grind in a mill was also the work of women,
Exodus 11:5; as it was in early times; Homer c speaks of it as in times before him; but others take the words in a figurative sense, as if he imprecated that she lie with another man, and be defiled by him, as the Targum, Aben Ezra, and others d; see Isaiah 47:1; and in like manner the following clause:
and let others bow down upon her; both which phrases are euphemisms, or clean and decent expressions, signifying what otherwise is not to be named; the Scriptures hereby directing, as to avoid unchaste thoughts, inclinations, and desires, and impure actions, so obscene words and filthy talking, as becometh saints: but there is some difficulty in Job's imprecating or wishing such a thing might befall his wife; it could not be lawful, if he had sinned, to wish his wife might sin also; or, if he was an adulterer, that she should be an adulteress; the sense is not, that Job really wished such a thing; but he uses such a way of speaking, to show how remote he was from the sin of uncleanness, there being nothing more disagreeable to a man than for his wife to defile his bed; it is the last thing he would wish for: and moreover Job suggests hereby, that had he been guilty of this sin, he must own and acknowledge that he would be righteously served, and it would be a just retaliation upon him, should his wife use him, or she be used, in such a manner; likewise, though a man may not wish nor commit a sin for the punishment of another; yet God sometimes punishes sin with sin, and even with the same kind of sin, and with this; so David's sin with Bathsheba was punished with Absalom lying with his wives and concubines before the sun, 2 Samuel 12:11; see Deuteronomy 28:30.
c Odyss. 7. v. 107. Odyss. 20. v. 109. d So T. Bab Sotah, fol. 10. 1. Luther, Schmidt apud Stockium, p. 414.