Sayyida Umm Atiyyah (may Allah be pleased with her) narrates: The Prophet Muhammad (peace and blessings be upon him) said: "It is not permissible for any woman who believes in Allah and the Last Day to mourn for anyone who dies for more than three days, except in the case of her husband, for whom she should mourn for four months and ten days. (During her waiting period) she should not apply kohl, nor wear colored clothes, except for a simple garment. She should not apply perfume, except when she becomes pure after menstruation, at which time she may use a little qust or azfar (i.e., a specific type of perfume) when bathing."