What is the ruling on the secret habit for the sake of need?

Question:
I have a son who frequently engages in the secret habit. What is its ruling? And what is the ruling on using it for the sake of need? I want a sufficient and satisfying answer. May Allah reward you with good.

Answer:

: The secret habit is reprehensible and not permissible. It is masturbation with the hand, so it is not permissible because it contradicts the saying of Allah the Exalted: EXCEPT WITH THEIR WIVES OR WHAT THEIR RIGHT HANDS POSSESS, FOR THEY ARE NOT TO BE BLAMED. BUT WHOEVER SEEKS BEYOND THAT, IT IS THEY WHO ARE THE TRANSGRESSORS [Al-Mu'minun: 5-7]. He has sought beyond that; he has sought to release semen other than through a wife or a slave woman, so it is not permissible for him to do so.
Then there is another matter: the people of knowledge in medicine have mentioned that this matter harms him greatly and that it has serious troubles. Therefore, he must be prevented from it in two ways: by the transmitted evidence and by the known harm. He should fear Allah and treat his desire by other means, either by fasting or by some medicines that reduce the intensity of the desire. If he is able to take a second, third, or fourth wife, he should do so, marrying frequently until the evil departs from him.