Matthew Poole and continuators on Job 24:21

21. He evil entreateth the barren that beareth not , and doth not good to the widow.

Either 1. God, who is oft understood, who having cut off his person and brought him to his grave, continues his judgments upon his Wife or Widow, and Family. Or rather, the Oppressor, who is the principal subject of almost all that is said in this Chapter; whose great and manifold wickedness Iob described from v. 2, to 18. where he proceeds to relate the judgments of God upon him for his sins; which having done v. 13, 19, 20. he here returns to the declaration of his further wickednesses, the cause of these judgments.

Or, feedeth upon, or devoureth, or breaketh in pieces: for all these the word signifieth, and all come to one and the same thing.

Barrenness was esteemed a Curse and Reproach; and so he added affliction to the afflicted, whom he should have pitied and helped: But because such had no Children, and the Widows no Husbands, to defend or avenge their Cause, he exercised cruelty upon them.

Either 1. he did her much wrong and harm, it being usual in Scripture under such Negative expressions to contain the Affirmation of the contrary; as Exod. 20. 7. Prov. 17. 21. & 28. 21. And so this Branch answers to the former, of evil-entreating. Or 2. he afforded her no help, or advice, or comfort in her Distresses: And so he intimateth the greatness of Omission▪sins. and that the common neglect or contempt of plain and positive Duties, whether of Piety to God, or of Charity to men, is to be reckoned among high and hainous Crimes.