he heard Zainab the daughter of Umm Salamah narrating that she heard Umm Salamah and Umm Habibah mention that a woman came to the Prophet ﷺ and said that her daughter's husband had died, and she was suffering from an eye disease, and she wanted to apply kohl to her eyes (as a remedy). The Messenger of Allah ﷺ said: "One of you would throw a she-camel's dropping when a year had passed (since the death of her husband. Rather it is four months and ten (days)."  

أَنَّ امْرَأَةً أَتَتِ النَّبِيَّ ﷺ فَقَالَتْ إِنَّ ابْنَةً لَهَا تُوُفِّيَ عَنْهَا زَوْجُهَا فَاشْتَكَتْ عَيْنُهَا فَهِيَ تُرِيدُ أَنْ تَكْحَلَهَا فَقَالَ رَسُولُ اللَّهِ ﷺ قَدْ كَانَتْ إِحْدَاكُنَّ تَرْمِي بِالْبَعْرَةِ عِنْدَ رَأْسِ الْحَوْلِ وَإِنَّمَا هِيَ أَرْبَعَةَ أَشْهُرٍ وَعَشْرًا