What did the Prophet Muhammad (saw) advise when asked if a widow may apply kohl to her eyes?
      Narrated Um Salama:                          A woman was bereaved of her husband and her relatives worried about      her eyes (which were diseased). They came to Allah's Apostle, and      asked him to allow them to treat her eyes with kohl, but he said, "She     should not apply kohl to her eyes. (In the Pre-Islamic period of      Ignorance) a widowed woman among you would stay in the worst of her      clothes (or the worst part of her house) and when a year had elapsed,      if a dog passed by her, she would throw a globe of dung, Nay, (she      cannot use kohl) till four months and ten days have elapsed."