Is it permissible to take from one's father's money without his knowledge if he is working for him and he does not give him a wage to spend on himself?

Question:
He says: My father has a shop, and I work in it during my summer vacation for about twelve hours a day. My father does not provide me with personal expenses unless I make some visits to our relatives. Also, I buy a lot of books, cassettes, and magazines, and I am unable to attend to my religious affairs unless I have some money and spending. So, is there a sin on me if I take from the proceeds of that shop without my father knowing and without his permission?

Answer:
May Allah reward you with good. There is no doubt that serving the father and obeying the father is an act of righteousness and obedience to Allah, Glorified and Exalted is He. So you are doing well in your statement that you perform your father's work and serve him. But this does not permit you to take anything from his money except if he gives you permission, in which case there is no harm. As for if he says that he did not give you permission, then it is not permissible for you to take anything from his money.
So if you see that this is in exchange for the work you are doing, you must agree with him that he pays you a sum of money in exchange for this work, or a monthly salary. There is no harm in you agreeing with him on a salary or a sum of money to meet your needs, or you ask your father to buy the things you want for you.
First, it is necessary to agree with your father. As for taking something without him knowing, that is not permissible. First, what if this becomes a cause of severing ties, or becomes a cause of misunderstanding between you and your father later, or becomes a cause of angering your father against you? Yes. May Allah reward you with good.