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.