"The Messenger of Allah 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.'"
Reference: Sunan an-Nasa'i 3534 In-book : Book 27, Hadith 148 English translation : Vol. 4, Book 27, Hadith 3564
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