Is it permissible for a father to spend from the inherited money of his orphaned children, which they inherited from their mother, on his wife and other children, knowing that his monthly income is insufficient to cover their expenses?

It is not permissible for the guardian of a minor to spend from the minor's money on others. Rather, it is obligatory for him to preserve the money and manage it in a way that serves the minor's best interest. However, if the guardian is poor and his salary is insufficient, he may take from the money of his minor children what suffices for his own expenses, and the expenses of his wife and his young children. He must also consider how to distribute this expenditure if there are multiple beneficiaries.