How does a husband justly deal between his two wives (Hind and Sarah) regarding going to the market, visiting family and relatives, receiving guests, and going to the hospital, given that one of them becomes upset and angry when the needs of the other are met on a day not designated for her?

It is obligatory for a husband to be just among his wives in the division [of time], and what is considered is spending the night, with the daytime following suit. Therefore, it is not permissible to visit one of the wives during the day, when it is not her turn, without a need, unless the other wife consents. However, visiting for a need is permissible, such as delivering maintenance or visiting the sick. Thus, whatever is customarily considered a need allows for a visit, unlike what is not considered so, as that would be considered favoritism and injustice.