سنن النسائي

It was narrated that Umm 'Atiyyah said: "The Messenger of Allah (ﷺ) said: 'No woman should mourn for anyone who dies for more than three days, except for a husband, for whom she should mourn for four months and ten days. She should not wear garments that are dyed or patterned, or put on kohl or comb her hair, and she should not put on any perfume except when purifying herself after her period, when she may use a little of Qust or Azfar.'"