When the news of the death of Abu Sufyan reached from Sham, Um Habiba on the third day, asked for a yellow perfume and scented her cheeks and forearms and said, "No doubt, I would not have been in need of this, had I not heard the Prophet (ﷺ) saying: "It is not legal for a woman who believes in Allah and the Last Day to mourn for more than three days for any dead person except her husband, for whom she should mourn for four months and ten days."
Sahih al-Bukhari Book 23, Hadith 41
← Previous Hadith 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."

Sahih al-Bukhari Book 23, Hadith 40 Next Hadith → I went to Um Habiba, the wife of Prophet, who said, "I heard the Prophets saying, 'It is not legal for a woman who believes in Allah and the Last Day to mourn for any dead person for more than three days except for her husband, (for whom she should mourn) for four months and ten days'." Later I went to Zainab bint Jahsh when her brother died; she asked for some scent, and after using it she said, "I am not in need of scent but I heard Allah's Messenger (ﷺ) saying, 'It is not legal for a woman who believes in Allah and the Last Day to mourn for more than three days for any dead person except her husband, (for whom she should mourn) for four months and ten days.' "

Sahih al-Bukhari Book 23, Hadith 42