Suppose Zayd says: لِخَالِدٍ عَلَيَّ أَلْفُ دِرْهَمٍ—“I owe Khalid 1,000 dirhams.” He speaks about his personal financial obligation, not about specific coins of Khalid sitting in Zayd's cupboard.
A debt measured in money is normally discharged by paying the amount owed, not necessarily by returning particular physical coins. The point is liability in the debtor's estate.
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The legal force of ʿalayya
Kitab al-Iqrar: Debt and Trust, Admissions by Reply, and Deferred Debts
Suppose Zayd says: لِخَالِدٍ عَلَيَّ أَلْفُ دِرْهَمٍ—“I owe Khalid 1,000 dirhams.” He speaks about his personal financial obligation, not about specific coins of Khalid sitting in Zayd's cupboard.
A debt measured in money is normally discharged by paying the amount owed, not necessarily by returning particular physical coins. The point is liability in the debtor's estate.