Was tahajjud prayer obligatory because it is mentioned in the Quran (17:79), if not then let me know that whether it is Sunnah or nafl?
Answer
(Fatwa: 1074/1074/M=1433)
Tahajjud salah is not fardh rather it is nafl, but the holy Prophet Muhammad (صلى الله عليه وسلم) has regularly performed it hence it is right to say it sunnah as well.
Allah (Subhana Wa Ta’ala) knows Best
Darul Ifta,
Darul Uloom Deoband