Sunan an-Nasa'i, Volume 3, Book 22, Hadith 2379 (DarusSalam) ⓘ

It was narrated from 'Ata that he narrated that someone who heard him said that 'Abdullah bin 'Amr bin AL-As said: "The Messenger of Allah said: 'The one who fasts every day of his life has neither fasted, nor broken the 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."

أَخْبَرَنَا أَحْمَدُ بْنُ إِبْرَاهِيمَ بْنِ مُحَمَّدٍ، قَالَ حَدَّثَنَا ابْنُ عَائِذٍ، قَالَ حَدَّثَنَا يَحْيَى، عَنِ الأَوْزَاعِيِّ، عَنْ عَطَاءٍ، أَنَّهُ حَدَّثَهُ قَالَ حَدَّثَنِي مَنْ، سَمِعَ عَبْدَ اللَّهِ بْنَ عَمْرِو بْنِ الْعَاصِ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏ "‏ مَنْ صَامَ الأَبَدَ فَلاَ صَامَ وَلاَ أَفْطَرَ ‏" ‏ ‏.‏