Historicity in Hadith Studies

Without doubt many religious statements, especially the Quranic verses are eternal and everlasting, but there are some statements which are specific to a period or some certain periods and they are expired when they are out of that period or periods due to changes in subject and conditions and they are used as an example or the history of the event. A survey of juriprudential hadith and speeches of hadith and fiqh scholars will lead us to some criteria for evaluating hadith.