(72) باب النَّهْىِ عَنْ صِيَامِ الدَّهْرِ، وَذِكْرِ الاِخْتِلاَفِ، عَلَى مُطَرِّفِ بْنِ عَبْدِ اللَّهِ فِي الْخَبَرِ فِيهِ
Mutarrif bin 'Abdullah bin Ash-Shikhkhir narrated from his father that:
the Messenger of Allah said, concerning one who fasted for the rest of his life: "He neither fasted nor broke his fast." 'Ata said: "someone who heard him told me that Ibn 'Umar (said) that the Prophet said: 'Whoever fasts every day of his life, then he has not fasted."
Reference: Sunan an-Nasa'i 2381
In-book reference: Book 22, Hadith 292
English translation: Vol. 3, Book 22, Hadith 2383