Is it permissible to give money to one's father for him to use in trade, while delaying the repayment of his debts, or is repaying his debts more prioritized, and would not giving him the money be considered an act of disobedience?

The maintenance of a child is obligatory upon his father, even if the father is poor and unable to earn a living. This maintenance should be in accordance with what is customary, including food, drink, clothing, and medicine. It is not obligatory for the child to pay off his father's debt, but it is commendable for him to do so, as it is an act of filial piety. This commendability increases if the debt is due, given that paying off a debt is obligatory upon a solvent debtor.