The two primary sources of Islamic law are (1) the Quran; and (2) the Sunna. The Quran is the Muslim's Holy Scripture. It is a compilation of revelations - the Word of God - received by the Prophet Mohammad (PBUH) beginning in 610 A.D. The Sunna is essentially the prophetic example embodied in the sayings, conduct, and traditions of the Prophet (PBUH).  In addition, there are two secondary sources of Islamic law: (1) qiyas (reasoning by analogy); and (2) ijma (consensus of the jurists and sometimes the community). There are other secondary sources that jurists relied upon to elaborate on the law such as equity, public interest, and custom.