Umm 'Atiyya (Allah be pleased with her) reported that Allah's Messenger (ﷺ) had said: A woman must not observe mourning for one who had died for more than three (days) except for four months and ten days in the case of her husband. and she must not wear a dyed garment except one of the types made of dyed yarn, or apply collyrium, or touch perfume except a little perfume or incense, when she has been purified after her courses.
Umm 'Atiyya (Allah be pleased with her) said: We were forbidden to observe mourning for the dead beyond three days except in the case of husband (where it is permissible) for four months and ten days, and (that during this period) we should neither use collyrium nor touch perfume, nor wear dyed clothes, but concession was given to a woman when one of us was purified of our courses to make use of a little incense or scent.