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and, in his view, such a transaction does not fall under the prohibition of exchanging one debt for another (dīn bi-dīn). A number of Mālikī jurist-theologians in Baghdad sided with Ashhab, arguing that “debt for debt” applies only when both considerations remain outstanding; once either side has been taken into possession, the transaction is no longer classified as an exchange of debts.
به وليس من باب الدين بالدين واختار قول أشهب جماعة من نظار المالكيين ببغداد لأن الدين بالدين ما اغترف الدين طرفيه وأما ما لم يغترف طرفيه فليس دينا بدين