Hadith of the Ark ""perished whoever turned away from it"" also comes along." And in his another book, Al-Heithami indicates this hadith as authentic (sahih). According to Dahlan, the authenticity of this hadith is confirmed by different sources. The hadith implies the absolute priority of "Ahl al-Bayt" to all others, otherwise Muhammad would have forbidden to follow them. According to Shia scholars, the only path to salvation is by following the "Ahl al-Bayt", so they must be infallible ("Ma'sum"), otherwise they will mislead their followers. If they are infallible, they must be Imam definitely. According to this hadith, they are the criterion of distinguishing
Hadith terminology its source. This provides confirmation that the "hadith" is authentically attributed to its source at a level above reasonable doubt. This is due to its being beyond historical possibility that narrators could have conspired to forge a narration. In contrast, an "ahaad hadith" is a narration the chain of which has not reached a number sufficient to qualify as "mutawatir". "Hadiths" can be "mutawatir" in both actual text and meaning: The second category, "ahaad" ( meaning "singular") narration, refers to any "hadith" not classified as "mutawatir". Linguistically, "hadith ahad" refers to a "hadith" narrated by only one narrator. In "hadith"