Linguistically, Daleel means a proof, indication, or evidence. As a term, Daleel means the source or evidence for a thought, concept, or a ruling. Any law or ruling must have a Daleel, which can be from Qur‟an, Sunnah, or a source, which Qur‟an and Sunnah directed us to adopt. These sources will be discussed later in the book. Any ruling from the text of either the Qur‟an or Sunnah is considered a Daleel. For example, the Qur‟an states:

“Let there arise out of you a group of people inviting to all that is good (Islam) and enjoining what is right and forbidding what is wrong.” (TMQ Al-Imran: 104)

This Ayah is considered a Daleel for the obligation of establishing a Hizb (party or group) calling for Islam and enjoining what is M‟aruf (good) and forbidding what is Munkar (bad).

An example of a Daleel from the Sunnah is the prohibition to the call for nationalism. The Prophet (saw) said about all types of „Asabiyah (nationalism, racism, tribalism):

“Leave it, it is rotten.” (Bukhari & Muslim)