(72) باب النَّهْىِ عَنْ صِيَامِ الدَّهْرِ، وَذِكْرِ الاِخْتِلاَفِ، عَلَى مُطَرِّفِ بْنِ عَبْدِ اللَّهِ فِي الْخَبَرِ فِيهِ
It was narrated that 'Imran said:
"It was said: 'O Messenger of Allah, so and so never broke his fast, even for one day for the rest of his life.' He said: 'He has neither fasted nor broken 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 2379
In-book reference: Book 22, Hadith 290
English translation: Vol. 3, Book 22, Hadith 2381