And it is not necessarily limited to knowledge production in the legal sciences alone, such as interpretation, hadith, jurisprudence, and so on, but it extends to include all the books left by Muslim scholars through the ages in various branches of knowledge, and in various languages, and in every part of the world in which the call of Islam has reached. The Islamic heritage can be defined as all that was left by the Muslim ancestors of religious belief (the Qur’an and Sunnah) and civilizational gifts (material and moral).