The Sunnah is one of two sources of Islamic law and it is significant.
 Ibn Qutaybah (213-276 AH) distinguished between:Sunnah "brought by Gabriel";sunnah from "Muhammad's own ra'y and is binding, but subject to revision";"non-binding sunnah", which Muslims are not subject to "penalty for failure to follow"
Therefore, along with the Quran, the sunnah was revealed

