The Ruling on a Father Preventing His Son from Voluntary Fasting

Question:
This questioner is from Libya. He says: My father objects to my practicing some of the sunnahs and recommended acts, such as voluntary fasting, on the grounds that I am thin, and going to the mosque early in Ramadan without need. Is it permissible for me to fast without his knowledge and keep my fasting secret, knowing that I am a young man who greatly needs to fast? And is it permissible for me to consult him about every recommended act and sunnah I perform?

Answer:
If your father needs you to serve him, and if you fast you become weak and unable to serve him, then do not fast, because this weakens you for serving him, or delays you from serving him and being dutiful to him. However, if this does not conflict with serving him or being dutiful to him, then he has no right to prevent you from fasting voluntarily. In fact, this is for your benefit and his benefit as well. It is not permissible for parents to be harsh and prevent their son from his religious and worldly interests, unless they conflict with their rights. The one who fasts or goes to the mosque early does not conflict with the interests of the parents. Rather, this is in the interest of the parents, as they receive supplication and the righteousness of the son. Yes.