Commentary for Job 24:21

He feeds the barren woman who will not bear so was their custom: One would marry two wives, one for coitus and one for children. The one intended for coitus he would give a potion of roots to drink in order that she should never give birth, and he would feed her delicacies, bathe her, and adorn her, so that she should appear beautiful. The one intended for children he would dress in widow’s garments and starve. This is the meaning of his statement that the barren woman who will not give birth he would feed and adorn, but the “widow,” who was intended for children, he would not adorn.