Muslims believe the Qur’an is the immutable, eternal words and instructions of Allah and the most sacred of all Islamic scripture. The second most important Islamic text is the Hadith, and the third is the Sira, a biography of Muhammad’s life. We have provided links to and information about the Qur’an and Hadith here, as well as to Reliance of the Traveller, which informs Muslims on Islamic law known as Sharia.