Sahih al-Bukhari Book 68, Hadith 86
We were forbidden to mourn for more than three days for a dead person, except for a husband, for
whom a wife should mourn for four months and ten days (while in the mourning period) we were not
allowed to put kohl in our eyes, nor perfume our-selves, nor wear dyed clothes, except a garment of
'Asb (special clothes made in Yemen). But it was permissible for us that when one of us became clean
from her menses and took a bath, she could use a piece of a certain kind of incense. And it was
forbidden for us to follow funeral processions.
We were forbidden to mourn for more than three days except for a husband.
The Prophet (ﷺ) 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"