Perpetual Fasting

Question

A person fasts perpetually. Is this permissible or not, and will he receive reward for fasting perpetually or not?

Answer

Fasting perpetually in such a way that one fasts even on the prohibited days (ayyam manhiyya) is makruh tahrimi. If one does not fast on the prohibited days and fasts the whole year, there is a difference of opinion on this: some have called it makruh, because it becomes a habit and no longer remains worship, or because it greatly increases weakness, as stated in Maraqi…

Source: Fatawa Mahmudiyya

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