The commentaries of the reputed jurists of courts and great writers and scholars on law also become a source of laws .

The commentaries of the reputed jurists of courts and great writers and scholars on law also become a source of laws .The jurists collect and arrange in logical form past customs, beliefs, examples of justice ,decisions and laws and then new laws are made .They discuss and elaborate the existing law and make it clear where it is ambiguous and reasons of this ambiguity .His arguments and commentaries are not binding on the judges but they are guided by them in their decisions because judges read the books of these scholars. We can say that if there is no solution of any problem the books of these expertise helpful to decision making.