What is called interest

Question

Question: What kind of profit is called interest (riba), and what is it that is called interest?

Answer

Any excess obtained without a counter-value is interest; for example: giving one maund (a unit of weight, ≈ 37 kg) of wheat and taking one maund and one seer (a unit of weight, ≈ 0.93 kg) of wheat; giving ten tolas (a unit of weight, ≈ 11.66 g)

Source: Fatawa Mahmudiyya

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