The Qur'an is the last revealed word of Allah and the basic source of Islamic teachings and laws. Qur'an deals with a variety of subjects including the basic beliefs of Islam: morality, worship, knowledge, wisdom, Allah and man's relationship, and human relations. Comprehensive teachings upon which sound systems of social justice, economics, politics, legislation, jurisprudence, law and international relations can be built, are important contents of the Holy Qur'an.
Though Prophet Muhammad did not receive a formal education, the Qur'an, as soon as it was revealed to him in the spoken word, was committed to writing by his secretaries. In this way, every word was written down and preserved during his lifetime by his companions. The original and complete text of the Qur'an is in Arabic language and interpretations of its meaning in most of the known languages are available in major libraries and bookstores.
Hadith, the teaching, sayings and actions of Prophet Muhammad, meticulously reported and collected by his devoted companions, explain and elaborate the Qur'anic verses.
North Arabian tribe which ruled in Mekka in the early 7th century AD, made up of a number of families of different degrees of wealth The Prophet Muhammad (Peace be upon Him), his descendants, the first four Caliphs, the Umayyads, and the Abbasids were all from this tribe.