Sunan Ibn Majah 1716
سنن ابن ماجه#1716Sahihحَدَّثَنَا عَلِيُّ بْنُ مُحَمَّدٍ، حَدَّثَنَا عَبْدُ اللَّهِ بْنُ نُمَيْرٍ، عَنْ سَعْدِ بْنِ سَعِيدٍ، عَنْ عُمَرَ بْنِ ثَابِتٍ، عَنْ أَبِي أَيُّوبَ، قَالَ: قَالَ رَسُولُ اللَّهِ ـ صلى الله عليه وسلم ـ " مَنْ صَامَ رَمَضَانَ ثُمَّ أَتْبَعَهُ بِسِتٍّ مِنْ شَوَّالٍ، كَانَ كَصَوْمِ الدَّهْرِ " .
It was narrated from Abu Ayyub that the Messenger of Allah (ﷺ) said:“Whoever fasts Ramadan then follows it with six days of Shawwal, it is as if he fasted for a lifetime.”
Scholarly Authentication
The label above is the grade most of these scholars gave, each scholar counted once — one dissenting opinion no longer speaks for all of them. If any scholar calls a narration fabricated, that verdict is shown instead, whatever the others say. When they judged only its chain of narrators (“Isnaad”), the label says “Sound chain”. Each scholar's own wording:
Our source also lists this ruling under Muhammad Fouad Abd al-Baqi, the editor of the printed edition it was taken from. It is al-Albani's ruling printed again, so it is counted once.
In-book reference: 7:79