Sahih Bukhari | Volume 7 | Hadith Number 255

Narrated by Um 'Atiyya
The Prophet said, "It is not lawful for a lady who believes in Allah and the Last Day, to mourn for more than three days for a dead person, except for her husband, in which case

she should neither put kohl in her eyes, nor perfume herself, nor wear dyed clothes, except a garment of 'Asb" Um 'Atiyya added: The Prophet said, "She should not use perfume except when she becomes clean from her menses whereupon she can use Qust, and Azfar (two kinds of incense).