‏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....

‏الأضاحي : Hadeeth No:4857 Jabir reported that Allaah's Prophet (sallAllaahu alayhi wa sallam) forbade eating of the flesh of sacrificed animals beyond three (days). but afterwards said: Eat, make a provision, and keep it....