The different proofs that establish the authority of the Sunnah in Islam.This is part of a series of lectures on the sciences of Hadith delivered at the QSS centre in the summer of 2007.Navaid Aziz was born in Montreal, Canada. He finished his high school with honors from Centennial Regional High School. He then graduated from Champlain College in Commerce and Social Sciences. He completed his diploma in Arabic in Madina from 2000-2003, after which he has been pursuing his second year of the Sharee'ah faculty. He has studied under many great scholars including, and more specifically with: Saaleh As-Sindee, Ahmad Rashid Ar-Ruhaily, Saalih al-'Aqeel, and Ahmad Al-Ghunaymaan. Some of his close teachers have been Sh. Yasir Qadhi and Dr. Abu Ameenah Bilal Philips, as well as other illustrious personalities in Madina.