Sunan an-Nasa'i 2398
سنن النسائي#2398Da'ifIt was narrated that 'Abdullah bin 'Amr said:"The Messenger of Allah said to me" and he quoted the same Hadith. '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
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Al-AlbaniDaif
In-book reference: 22:309