Muhammad negated the Hadiths.
Besides the Quran , Muhammad 's teachings and practices -LRB- sunnah -RRB- , found in the Hadith and sira literature , are also upheld by Muslims and used as sources of Islamic law -LRB- see Sharia -RRB- .	Quran	Quran	sunnah	sunnah	Hadith	Hadith	sira	Prophetic biography	sources	sources of sharia	Sharia	Sharia
