What is the ruling on the money the son will receive from his father after responding with "Where would I get it from?" to his father's question "What do you have?" while knowing that he possesses some money?

It is not permissible for a son to take his father's money through deception or without the father's willing consent, because the Prophet, peace and blessings be upon him, said: "The property of a Muslim person is not lawful except with his willing consent," and because Aisha said: "A child does not consume from his father's money except with his permission." An exception to this is if the father does not spend on the son while he is young or incapacitated.