According to search-discovered classical Islamic scholarship, the concept of 'Proper Conduct' (Husn al-Khuluq) is a cornerstone of faith, built upon principles of social justice, financial integrity, and moral uprightness. An analysis of Quranic verses 4:5, 4:6, and 6:151 provides a powerful thematic synthesis of this principle. Tafsir by authorities like Ibn Kathir and Al-Tabari on verses 4:5-6 establishes the sacred trust of guardianship over the wealth of orphans and the incompetent, demanding that it be protected and only handed over upon proven maturity. [2, 7] This specific financial ethic is then broadened in verse 6:151, which outlines the universal moral code for believers, prohibiting major sins such as shirk, disrespect to parents, and killing, while mandating absolute justice. Al-Qurtubi's juridical analysis highlights that these commands are not mere recommendations but form the basis of Islamic law and social order. [5] Thus, proper conduct is not merely personal etiquette but a comprehensive system that integrates the protection of the vulnerable with steadfast adherence to divine commandments, ensuring justice and compassion in society.