Is it permissible for a husband to favor his first wife in terms of spending on her and providing her with means of comfort, while falling short in the rights of his second wife, knowing that the husband is well-off?

The husband must be just between his wives in the obligatory maintenance. If he falls short in the obligatory maintenance, it is not permissible, and the wife can demand it through the judiciary. However, if the shortfall is in maintenance whose obligation is disputed, it is better to overlook the demand to avoid problems. The husband should not grumble or get angry at the wife's request; rather, he must treat her kindly and fulfill the request if he can, or apologize politely.

The obligatory maintenance for the wife includes: - Food: A "mudd" (measure) of food for a wealthy person, half a "mudd" for a middle-income person, and a "mudd" for a poor person, and it must be the predominant staple food of the land. - Condiments: The predominant condiments of the land, such as oil, ghee, cheese, and dates, are obligatory and vary with the seasons. - Clothing: A shirt, trousers, head covering, and a square cloth, with an additional cloak in winter. It should be made of cotton, and may increase according to the custom of the land. - Bedding and Shelter: Something to sit on, such as a rug, felt mat, or straw mat, a bed for sleeping, a pillow, and a blanket in winter. - Cleaning tools: A comb, oil, and whatever is used to wash the head. - Eating and cooking utensils: A pot, bowl, cup, jar, and similar items. - Dwelling: A suitable dwelling for her, and it is not required for it to be owned by the husband. - Bathhouse fee and the price of water for washing after intercourse and postpartum, according to the more sound opinion.

Not obligatory: Kohl, henna, and what she uses for adornment, medicine for illness, doctor's fees, and cupper's fees, and the fee for water for washing after menstruation and nocturnal emissions. Clothing is given at the beginning of winter and summer. If it gets damaged without fault, it is not replaced. If he does not provide clothing for a period, it is considered a debt upon him.