The Ruling on Voluntary Fasting Without the Parents' Permission

Question:
The questioner Abdullah al-Hasan says: What is the ruling on voluntary fasting without obtaining the parents' approval, knowing that they will not be pleased with it? And does this ruling apply to the other voluntary acts, such as prayer, charity, Hajj, and 'Umrah?

Answer:
If fasting and the other voluntary acts interfere with the rights of the parents, then it is not permissible, because the right of the parents is obligatory, while voluntary fasting and other such acts are recommended. So if engaging in the recommended act occupies one from the obligatory act, which is dutifulness to the parents, then it is not permissible. But if engaging in the recommended acts does not occupy one from being dutiful to the parents and fulfilling their rights, then there is no harm in it, as there is no danger. Yes.