"Umm Habibah said: 'I heard the Messenger of Allah say: It is not permissible for a woman who believes in Allah and the Last Day to mourn for anyone who dies for more than three days, except for a husband; (she mourns for him for) four months and ten (days)."  

سَمِعْتُ رَسُولَ اللَّهِ ﷺ يَقُولُ لاَ يَحِلُّ لاِمْرَأَةٍ تُؤْمِنُ بِاللَّهِ وَالْيَوْمِ الآخِرِ تَحِدُّ عَلَى مَيِّتٍ فَوْقَ ثَلاَثَةِ أَيَّامٍ إِلاَّ عَلَى زَوْجٍ أَرْبَعَةَ أَشْهُرٍ وَعَشْرًا  

"From her mother?" He said: "Yes" - "that the Prophet was asked about a woman whose husband had died but they were worried about her eyes - could she use kohl?" He said: "One of you used to stay in her house wearing her shabbiest clothes for a year, then she would come out. No, (the mourning period is) four months and ten (days)."  

نَعَمْ إِنَّ النَّبِيَّ ﷺ سُئِلَ عَنِ امْرَأَةٍ تُوُفِّيَ عَنْهَا زَوْجُهَا فَخَافُوا عَلَى عَيْنِهَا أَتَكْتَحِلُ فَقَالَ قَدْ كَانَتْ إِحْدَاكُنَّ تَمْكُثُ فِي بَيْتِهَا فِي شَرِّ أَحْلاَسِهَا حَوْلاً ثُمَّ خَرَجَتْ فَلاَ أَرْبَعَةَ أَشْهُرٍ وَعَشْرًا  

"A woman came to the Prophet and said: 'My daughter's husband has died, and I am worried about her eyes. Can I apply kohl to her?' The Messenger of Allah said: 'One of you used to stay (in mourning) for a year. Rather (the mourning period is) four months and ten (days). And when that year had passed she would go out and fling a piece of dung behind her.'"  

عَنْ يَحْيَى بْنِ سَعِيدِ بْنِ قَيْسِ بْنِ قَهْدٍ الأَنْصَارِيِّ وَجَدُّهُ قَدْ أَدْرَكَ النَّبِيَّ ﷺ عَنْ حُمَيْدِ بْنِ نَافِعٍ عَنْ زَيْنَبَ بِنْتِ أُمِّ سَلَمَةَ عَنْ أُمِّ سَلَمَةَ وَأُمِّ حَبِيبَةَ قَالَتَا جَاءَتِ امْرَأَةٌ إِلَى النَّبِيِّ ﷺ فَقَالَتْ إِنَّ ابْنَتِي تُوُفِّيَ عَنْهَا زَوْجُهَا وَإِنِّي أَخَافُ عَلَى عَيْنِهَا أَفَأَكْحُلُهَا فَقَالَ رَسُولُ اللَّهِ ﷺ قَدْ كَانَتْ إِحْدَاكُنَّ تَجْلِسُ حَوْلاً وَإِنَّمَا هِيَ أَرْبَعَةَ أَشْهُرٍ وَعَشْرًا فَإِذَا كَانَ الْحَوْلُ خَرَجَتْ وَرَمَتْ وَرَاءَهَا بِبَعْرَةٍ  

"It is not permissible for a woman who believes in Allah and the Last Day to mourn for anyone who dies for more than three days except for a husband; she should mourn for him for four months and ten (days)."  

أَنَّهَا سَمِعَتْ حَفْصَةَ بِنْتَ عُمَرَ زَوْجَ النَّبِيِّ ﷺ عَنِ النَّبِيِّ ﷺ قَالَ لاَ يَحِلُّ لاِمْرَأَةٍ تُؤْمِنُ بِاللَّهِ وَالْيَوْمِ الآخِرِ تَحِدُّ عَلَى مَيِّتٍ فَوْقَ ثَلاَثٍ إِلاَّ عَلَى زَوْجٍ فَإِنَّهَا تَحِدُّ عَلَيْهِ أَرْبَعَةَ أَشْهُرٍ وَعَشْرًا  

"It is not permissible for a woman who believes in Allah and the Last Day to mourn for anyone who dies for more than three days except for a husband; she should mourn for him for four months and ten (days)."  

عَنْ بَعْضِ أَزْوَاجِ النَّبِيِّ ﷺ وَعَنْ أُمِّ سَلَمَةَ أَنَّ النَّبِيَّ ﷺ قَالَ لاَ يَحِلُّ لاِمْرَأَةٍ تُؤْمِنُ بِاللَّهِ وَالْيَوْمِ الآخِرِ تَحِدُّ عَلَى مَيِّتٍ أَكْثَرَ مِنْ ثَلاَثَةِ أَيَّامٍ إِلاَّ عَلَى زَوْجٍ فَإِنَّهَا تَحِدُّ عَلَيْهِ أَرْبَعَةَ أَشْهُرٍ وَعَشْرًا  

A similar report was narrated from Safiyyah bint Abi 'Ubaid from one of the wives of the Prophet -and she is Umm Salamah- from the Prophet.  

عَنْ بَعْضِ أَزْوَاجِ النَّبِيِّ ﷺ وَهِيَ أُمُّ سَلَمَةَ عَنِ النَّبِيِّ ﷺ نَحْوَهُ