Sunan Ibn Majah 1916
سنن ابن ماجه#1916Hasanحَدَّثَنَا هَنَّادُ بْنُ السَّرِيِّ، حَدَّثَنَا عَبْدَةُ بْنُ سُلَيْمَانَ، عَنْ مُحَمَّدِ بْنِ إِسْحَاقَ، عَنْ أَيُّوبَ، عَنْ أَبِي قِلاَبَةَ، عَنْ أَنَسٍ، قَالَ قَالَ رَسُولُ اللَّهِ ـ صلى الله عليه وسلم ـ " إِنَّ لِلثَّيِّبِ ثَلاَثًا وَلِلْبِكْرِ سَبْعًا " .
It was narrated from Anas:that the Messenger of Allah said: “Three days for a previously-married woman and seven days for a virgin.”
Scholarly Authentication
The label above is the grade most of these scholars gave — 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. Each scholar's own wording:
Al-AlbaniHasan
Muhammad Fouad Abd al-BaqiHasan
Zubair Ali ZaiHasan
In-book reference: 9:72