Sources of law means the origin from which rules of human conduct come into existence and derive legal force or binding characters.It also refers to the sovereign or the state from which the law derives its force or validity.

Several factors of law have contributed to the development of law. These factors are regarded as the sources of law.

Precedent is one of the sources of law. The judgements passed by some of the learned jurists became another significant source of law. when there is no legislature on particular point which arises in changing conditions, The judges depend on their own sense of right and wrong and decide the disputes. such decisions become authority or guide for subsequent cases of a similar nature and they are called precedents. The dictionary of English law defines a judicial precedent as a judgement or decision of a court of law cited as an authority for deciding a similar state of fact in the same manner or on the same principle or by analogy. Precedent is more flexible than legislation and custom. It is always ready to be, used.

Zakir Abdul Karim Naik (Urdu: ذاکر عبدالکریم نائیک; born 18 October 1965) is an Indian public speaker on the subject of Islam and comparative religion. He is the founder and president of the Islamic Research Foundation (IRF), a non-profit organisation that owns the Peace TV channel based in Dubai, UAE. He is sometimes referred to as a televangelist. Before becoming a public speaker, he trained as a doctor. He has written two booklets on Islam and comparative religion. He is regarded as an exponent of the Salafi ideology; he places a strong emphasis on individual scholarship and the rejection of "blind Taqlid", which has led him to repudiate the relevance of sectarian or Madh'hab designations, all the while reaffirming their importance.

Zakir Abdul Karim Naik was born on 18 October 1965 in Mumbai, India. He attended St. Peter's High School in Mumbai. Later he enrolled at Kishinchand Chellaram College, before studying medicine at Topiwala National Medical College and Nair Hospital and later the University of Mumbai, where he obtained a Bachelor of Medicine and Surgery (MBBS). His wife, Farhat Naik, works for the women's section of the IRF.