Sahih Muslim 3735
صحيح مسلم#3735Sahihوَحَدَّثَنَا يَحْيَى بْنُ يَحْيَى، وَقُتَيْبَةُ، وَابْنُ، رُمْحٍ عَنِ اللَّيْثِ بْنِ سَعْدٍ، عَنْ نَافِعٍ، أَنَّ صَفِيَّةَ، بِنْتَ أَبِي عُبَيْدٍ حَدَّثَتْهُ عَنْ حَفْصَةَ، أَوْ عَنْ عَائِشَةَ، أَوْ عَنْ كِلْتَيْهِمَا، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ " لاَ يَحِلُّ لاِمْرَأَةٍ تُؤْمِنُ بِاللَّهِ وَالْيَوْمِ الآخِرِ - أَوْ تُؤْمِنُ بِاللَّهِ وَرَسُولِهِ - أَنْ تُحِدَّ عَلَى مَيِّتٍ فَوْقَ ثَلاَثَةِ أَيَّامٍ إِلاَّ عَلَى زَوْجِهَا " .
Safiyya bint Abu 'Ubaid reported on the authority of Hafsa or 'A'isha (Allah be pleased with thein) or from both of them that Allah's Messenger (may peace he upon him) said:It is not permissible for a woman believing in Allah and the Hereafter (or believing in Allah and His Messenger) that she should observe mourning for the dead beyond three days except in case of her husband
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:
Every narration in Sahih Muslim is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 18:80