It was narrated from Zainab bint Umm Salamah -I (the narrator) said:
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).