Hadith are "expressed in Muhammad's words", whereas the latter are the "direct words of God". A "hadith qudsi" need not be a "sahih" (sound hadith), but may be "da‘if" or even "mawdu‘". An example of a "hadith qudsi" is the hadith of Abu Hurairah who said that Muhammad said: When God decreed the Creation He pledged Himself by writing in His book which is laid down with Him: My mercy prevails over My wrath. In the Shia school of thought, there are two fundamental viewpoints of Hadith: The Akhbari view and the Usuli view. The Usuli scholars stress the importance of
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"