It is narrated from Umm Atiyyah (may Allah be pleased with her) that the Messenger of Allah (peace and blessings be upon him) said: "It is not lawful for a woman who believes in Allah and the Last Day to mourn for one who has perished for more than three days, except for her husband, for whom she mourns four months and ten days. She should not wear dyed clothing, nor a garment of 'asb, nor apply kohl with ithmid, nor apply perfume, nor use dye (khidab), except at (the end of) her purification, when she purifies herself after her menstruation, (using) a little qust or azfar (types of fragrant incense)."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب العدد / 15530