Sayyidah Umm Atiyyah (may Allah be pleased with her) said: A woman whose husband has died should not mourn for any deceased person except her husband; she should not apply kohl, nor use henna, nor wear dyed clothing except a garment of 'asb, nor apply perfume.
Hisham narrated likewise from Hafsah, from Umm Atiyyah (may Allah be pleased with her), from the Prophet (peace and blessings be upon him).
Hadith Referenceالمعجم الكبير للطبراني / مسند النساء / 21601