Details of prescribed movements and words of the prayer (known as "rakat's") and how many times they are to be performed, are found in hadith. However, hadiths differ on these details and consequently "salat" is performed differently by different hadithist Islamic sects. Quranists, on the contrary, hold that if the Quran is silent on some matter, it is because God did not hold its detail to be of consequence; and that some hadith contradict the Quran, evidence that some hadith are a source of corruption and not a complement to the Quran.