وَأَحَلَّ اللَّهُ الْبَيْعَ وَحَرَّمَ الرِّبَا
Allah has permitted trade and forbidden usury (riba). (al-Baqarah 2:275)
The source uses al-bayʿ as a general expression covering sales. The statement prohibiting riba makes clear that a riba-bearing transaction is not legitimized merely because it is also called a sale.
The example illustrates why the clauses of a revealed text must be read together rather than treating a general expression as isolated from its limiting evidence.