What is the proper way to dispose of the remaining money, amounting to 272 dinars, from the salary of a father suffering from senility, after giving the mother and daughter 150 dinars monthly; and is it permissible for the guardian to take a sum from it for his personal needs while he is spending on his parents and sister; and is it permissible to give from it to the rest of the family members when they are in need; and is it permissible for the guardian to pay zakat from it and give charity with the intention of the father?

The household head acting as an agent over his salary is not permitted to dispose of it except in ways that serve its best interest. He should spend from it only on himself, his wife, and his unmarried daughter. It is permissible for him to take from it in a reasonable manner if he is in need, by analogy with the words of Allah Almighty: "And whoever is rich, let him abstain [from taking a fee]; and whoever is poor, let him take thereof in a just and reasonable manner." As for the rest of the sons and married daughters, they have no right to this money except after the father's death, as an inheritance. The agent must pay the zakat (definition) on the money if it reaches the nisab (definition), and invest the remainder. He is not permitted to give charity or donations from it because it is someone else's money.