"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)." (Using translation from Nasāʾī 3501)
نَعَمْ إِنَّ النَّبِيَّ ﷺ سُئِلَ عَنِ امْرَأَةٍ تُوُفِّيَ عَنْهَا زَوْجُهَا فَخَافُوا عَلَى عَيْنِهَا أَتَكْتَحِلُ؟ فَقَالَ «قَدْ كَانَتْ إِحْدَاكُنَّ تَمْكُثُ فِي بَيْتِهَا فِي شَرِّ أَحْلَاسِهَا حَوْلًا فَإِذَا مَرَّ رَمَتْ بِبَعَرَةٍ ثُمَّ خَرَجَتْ فَلَا أَرْبَعَةَ أَشْهُرٍ وَعَشْرًا»