What is the ruling on a man gifting something in kind from his property to his daughter, to the exclusion of her sister, on the grounds that he furnished her sister for marriage with much more than her? And does the ruling differ if he gifts her land from if he gives her money?

If a father furnishes his daughter with what she needs for her marriage in a reasonable manner, this is not a prohibited preference; rather, it falls under the category of expenditure, and he is not obligated to give the same to his other children. However, if he spends on her in excess of what is needed, then he must be just among his other children and give them what equals the extra gift, because anything exceeding what is customary is considered a grant (a gift). There is no difference in justice whether the gift is cash or real estate.