Amos in his prophetic work advocated for true religion and social justice. He spoke out against the religious leaders and wealthy people of his time who were exploiting the poor and oppressed. Amos called for a return to the fundamental principles of justice and righteousness in both religious practice and social relationships. He believed that true worship of God should be accompanied by a commitment to doing what is right and fair for all people, especially the most vulnerable in society. In Amos 5:24, he says, "But let justice roll on like a river, righteousness like a never-failing stream!" This passage highlights Amos' message that true worship of God must be combined with a commitment to justice and righteousness in society.