‏الطلاق : Hadeeth No:3549 'A'isha (Allaah be pleased with her) reported Allaah's Messenger (sallAllaahu alayhi wa sallam) as saying: It is not permissible for a woman believing in Allaah and the Hereafter to observe mourning on the dead for more than three (days), except in case of her husband....

‏اللباس والزينة‏ : Hadeeth No:5187 This hadith has been reported on the authority of Hisham b. 'Urwa with a slight variation of wording....