Does a father sin by not giving his undutiful son the same as he gave his dutiful sons?

Question:
The questioner says: I have children, one of whom left the house because of smoking and has not returned to this day. I have married off the brothers who are with me and bought a car for each of them. I told him to come back and I would do for him what I did for his brothers, but he refused. So, is there anything required of me if I do not do for him what I did for his brothers, considering that he disobeyed me and left?

Answer:
If what you gave your children was only for their maintenance and their needs, there is nothing wrong with that. It is permissible for you to spend on them even if their maintenance is not equal, with each receiving according to his need. However, if you gave them an excess, something beyond their maintenance, then you must be equal between the children who are with you and the one who has left, as the Messenger of Allah (peace and blessings be upon him) said: Therefore, a gift requires equality, whereas maintenance is according to need. Yes.