Determining authenticity of hadith is enormously important in Islam because along with the Quran, the "Sunnah" of the Islamic prophet—his words, actions, and the silent approval—are considered divine revelation ("wahy"), and the record of them (i.e. hadith) provides the basis of Islamic law (Sharia). In addition, while the number of verses pertaining to law in the Quran is relatively few, hadith give direction on everything from details of religious obligations (such as "Ghusl" or "Wudu", ablutions for "salat" prayer), to the correct forms of salutations, and the importance of benevolence to slaves. Thus the "great bulk" of the rules of Islamic law are derived from hadith, rather than the Quran.