(30) باب إِحْدَادِ الْمَرْأَةِ عَلَى غَيْرِ زَوْجِهَا
Narrated Muhammad bin Seereen:
One of the sons of Um 'Atiyya died, and when it was the third day she asked for a yellow perfume and put it over her body, and said, "We were forbidden to mourn for more than three days except for our husbands."
Reference: Sahih al-Bukhari 1279
In-book reference: Book 23, Hadith 41
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 2, Book 23, Hadith 369