Sahih
Muslim
صحيح مسلم
18
The Book of Divorce
كتاب الطلاق
Chapter 9: The Obligation to mourn during the 'Iddah following the death of one's husband, but it is forbidden to mourn for more than three days in other cases
باب وُجُوبِ الإِحْدَادِ فِي عِدَّةِ الْوَفَاةِ وَتَحْرِيمِهِ فِي غَيْرِ ذَلِكَ إِلاَّ ثَلاَثَةَ أَيَّامٍ
Sahih Muslim 938 d
A hadith like this has been narrated on the authority of Hisham with the same chain of narrators but with a slight variation of words.
وَحَدَّثَنَاهُ أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا عَبْدُ اللَّهِ بْنُ نُمَيْرٍ، ح وَحَدَّثَنَا عَمْرٌو النَّاقِدُ، حَدَّثَنَا يَزِيدُ بْنُ هَارُونَ، كِلاَهُمَا عَنْ هِشَامٍ، بِهَذَا الإِسْنَادِ وَقَالاَ " عِنْدَ أَدْنَى طُهْرِهَا نُبْذَةً مِنْ قُسْطٍ وَأَظْفَارٍ " .
Grade: Sahih