Amos described true religion as being just and righteous. In the book of Amos, the prophet criticizes the Israelites for their false worship and their lack of justice and righteousness. He condemns their hypocritical religious practices, such as engaging in sacrifice and burnt offerings, and instead emphasizes the importance of doing what is right and just. Amos calls on the people of Israel to seek justice, love mercy, and walk humbly with God. He reminds them that true religion is not just about external rituals and ceremonies, but also about living a life that is pleasing to God. Therefore, true religion involves doing what is right and just, showing compassion and mercy to others, and walking in humility before God.