 The Quran served for the early Muslims, as it serves for the present Muslims, as the primary source for the notion of justice.As his capacity as a prophet, the Quranic notion of justice was explained and translated into practice by Muhammad in dealing with various social issues, thus setting moral and legal examples and standards of justice in society and paving ways for the later Muslim theologians and scholars to "formulate theories of justice".The obligation to establish justice comes as a fundamental principle in the Quran, second in importance only to the oneness of God.