What is the wisdom behind specifically mentioning "and upon the father is their provision and their clothing according to what is reasonable" (2:233), even though provision and clothing are generally obligatory upon the husband for his wife?

The verse mentioned indicates that a divorced wife, if she breastfeeds her child from her ex-husband, is entitled to maintenance and clothing according to the custom of her country. This differs from the maintenance and clothing of a wife who is still married, because the latter is fundamentally obligatory. The interpretations clarify that the maintenance and clothing referred to in the verse are for divorced nursing mothers, while the maintenance and clothing for non-divorced wives are obligatory upon their husbands whether they breastfeed their children or not.