"According to the long-standing oath between the al-Saud and al-Wahhab patriarchs in the 18th century, the Saudi state must adhere to Islamic principles. The state's law thus follows the strict principles of Wahhabi Islam, the conservative Sunni sect. According to Article 7 of the Basic Law (the kingdom's constitution that was adopted in 1992), the government's power is derived from the Koran and the traditions of the Prophet Muhammad (sunna)." (Quoted from article)