What are the conditions for financial support (nafaqah) for a daughter and a son, what are the differences between them, if any, to whom do these differences apply, or is the matter left to the discretion of the guardian?

Allah Almighty commanded justice in all matters, and it is one of the prominent characteristics of Islam. Justice among children applies to gifts and endowments, and to avoiding discrimination in upbringing, education, and care. As for financial support, medical treatment, and consumables, these should be provided according to each child's needs. An increase in financial support for one of them due to their needs does not imply injustice; rather, it is the essence of justice. The father is not obligated to compensate the other children for what was expended on some of them due to need.