Bulugh al-Maram #1290

Narrated Umm 'Atiyah (RA): Allah's Messenger (ﷺ) said: "A woman must not observe her mourning for more than three nights for the one who has died, except for the four months and ten days in the case of her husband; and she must not wear a dyed garment except one of the type made of 'Ash (dyed yarn) or apply Kuhl (antimony), or apply perfume, except for a little Qust or Azfar, when she has been purified after her menstruation." .