Sharea provisions are based on four resources, two of them are primary (Quran & Sunnah) and the other two are secondary Consensus (Ejma’), and Analogy (Qiyas).
1. Holy Quran
Scholars identify Holy Quran as follows "It’s the words of Allah revealed to his prophet Mohammad (PBUH), which reading is an act of worship, begins with Surat Al-Fatiha and ends with Surat Al-Nas.
2. Prophetic Narrations (Sunnah)
Sunnah is every act, saying and tacit approval of the prophet Mohammad (PBUH). Sunnah is considered and primary source of legislation due to instructions of Holy Quran. Many Verses commanded Muslims to follow the Prophet (PBUH) guidance such as in Suart Al Hashr, Verse 7: “So take what the Messenger assigns to you, and deny yourselves that which he withholds from you. And fear Allah, for Allah is strict in punishment”
Sunnah is divided into three divisions:
- The Prophet's Sayings.
- The Prophet Acts.
- The Prophet acceptance of others' a sayings or acts.
3. Ejma’ (Consensus)
The consent of Muslim Jurists on a specific issue in a specific time, such as Taraweeh Prayer in a congregation (Jama'a). Although it’s difficult to achieve Ejma’, the modern jurisprudential academies are playing important role in this regard.
4. Qiyas (Analogy)
In modern issues, of non-equivalence in the past, Muslim scholars in such case, seek for a common similarity between the discussed matter and similar matter that its provision in Sharia is known. Shall such a case be found, then, the modern issue gets the same provision. Drugs is a clear example of Qiyas, since it share the same mental effect with alcohol, and since alcohol drinking is strictly forbidden in Saria, then drugs is also forbidden (Haram).