Hadith 1486 c, 1488 e - The Book of Divorce - Sahih Muslim - صحيح مسلم - Collection of Actions, Sayings and Teachings of Prophet Muhammad (صلى الله عليه و سلم) - Kutub as-Sittah

18. The Book of Divorce - كتاب الطلاق

9) Chapter: 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

Zainab bint Abu Salama reported:

Umm Salama and Umm Habiba (Allah be pleased with them) were talking with each other (and saying) that a woman came to Allah's Messenger (ﷺ) and mentioned to him that her daughter had lost her husband, and her eyes were sore and she wnted to use collyrium, whereupon Allah's Messenger (ﷺ) said: One among you used to throw dung at the end of a year, and now (this abstinence from adornment) is only for four months and ten days.

Reference: 1486 c, 1488 e
English reference: Book 9, Hadith 3543
In-book reference: Book 18, Hadith 78
Grade: Sahih
Read this hadith from Darussalam Collection

9) باب وُجُوبِ الإِحْدَادِ فِي عِدَّةِ الْوَفَاةِ وَتَحْرِيمِهِ فِي غَيْرِ ذَلِكَ إِلاَّ ثَلاَثَةَ أَيَّامٍ

وَحَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، وَعَمْرٌو النَّاقِدُ، قَالاَ حَدَّثَنَا يَزِيدُ بْنُ هَارُونَ، أَخْبَرَنَا يَحْيَى بْنُ سَعِيدٍ، عَنْ حُمَيْدِ بْنِ نَافِعٍ، أَنَّهُ سَمِعَ زَيْنَبَ بِنْتَ أَبِي سَلَمَةَ، تُحَدِّثُ عَنْ أُمِّ سَلَمَةَ، وَأُمِّ حَبِيبَةَ تَذْكُرَانِ أَنَّ امْرَأَةً أَتَتْ رَسُولَ اللَّهِ صلى الله عليه وسلم فَذَكَرَتْ لَهُ أَنَّ بِنْتًا لَهَا تُوُفِّيَ عَنْهَا زَوْجُهَا فَاشْتَكَتْ عَيْنُهَا فَهْىَ تُرِيدُ أَنْ تَكْحُلَهَا فَقَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏‏ ‏.‏ "‏ قَدْ كَانَتْ إِحْدَاكُنَّ تَرْمِي بِالْبَعَرَةِ عِنْدَ رَأْسِ الْحَوْلِ وَإِنَّمَا هِيَ أَرْبَعَةُ أَشْهُرٍ وَعَشْرٌ ‏"