According to search-discovered classical Islamic scholarship, the principle of being fair in all dealings is a fundamental divine command, encapsulated by the Arabic terms 'Adl (justice) and Qist (equity). This principle mandates absolute honesty, integrity, and transparency in all transactions, whether in trade, speech, or social interactions. The Quran, in verses such as 6:152 and 17:35, explicitly commands believers to give full measure and weight with justice and to speak truthfully, even if it concerns a close relative. Classical scholars like Ibn Kathir and Al-Tabari interpret these verses as having a universal application, extending beyond mere commercial transactions to encompass all aspects of human interaction. The Prophetic traditions further emphasize this by promising great rewards for honest merchants and condemning all forms of deceit. This comprehensive understanding of fairness forms the bedrock of Islamic business ethics and modern Islamic finance, which prohibit exploitation and promote mutual benefit. The synthesis of these sources establishes fairness not just as a moral virtue but as an act of worship and a cornerstone of a just and prosperous society.