´It was narrated from Umm 'Atiyyah that the Prophet said:` "It is not permissible for a woman who believes in Allah and the Last Day, to mourn for anyone who dies for more than three days, except for a husband; she should not use kohl, dye nor wear dyed clothes."
Hadith Referenceسنن نسائي / كتاب الطلاق / 3566
Hadith Gradingالألبانی:صحيح | زبیر علی زئی:إسناده صحيح