This document discusses the definition and history of fasting in Islam. It defines fasting as the abstention from eating, drinking and sexual acts from dawn to sunset, as prescribed in the Quran and elaborated upon in the Hadith and Islamic jurisprudence. The prescription of fasting went through four stages - the Prophet initially instructed Muslims to fast three days per month including the Day of Ashura, then when Ramadan was designated as the fasting month this was no longer obligatory but voluntary, and finally Ramadan fasting became obligatory for all adult Muslims according to the Quranic verse cited. The document also discusses the different types and requirements of fasting in Islamic law.