1) Qur’an – Muslims are intensely dedicated to the study of the our holy scripture. It is our main source of guidance in terms of religion, administration of the state, law, inheritance, justice, history and many other topics.
2) Sunnah – The sayings and actions of Prophet Muhammad (peace be upon him) as compiled by the Sahabah, his contemporary companions.
3) Ijmaa – The rulings of the Sahabah.
4) Qiyaas – Self-judgment.