وَحَدَّثَنِي عَنْ مَالِكٍ، أَنَّهُ بَلَغَهُ أَنَّ أُمَّ سَلَمَةَ، زَوْجَ النَّبِيِّ صلى الله عليه وسلم كَانَتْ تَقُولُ تَجْمَعُ الْحَادُّ رَأْسَهَا بِالسِّدْرِ وَالزَّيْتِ ‏.‏

Yahya related to me from Malik that he had heard that Umm Salama,the wife of the Prophet, may Allah bless him and grant him peace,said, "A mourning woman can rub her head with lotus leaves and oliveoil.'' Translation Not Available

Book Ref: Muwatta Imam Malik Book 29 Hadith 1274
Web Ref:  Muwatta Imam Malik Book 29 Hadith 109