أعطني بنصفه فلوسا وبنصفه نصفا إلا حبة
Translation: Give me fulus for one half of it, and for the other half a half-dirham silver piece minus one grain.
The repetition of bi-nisfihi ('for half of it') is decisive. Half of the original dirham is expressly assigned to the fulus, and the other half to a silver piece weighing one grain less than half a dirham.
A grain (habbah) is a small historical weight unit; no fixed modern gram equivalent is asserted here.
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First formulation: expressly allocating half the dirham
Bab al-Sarf: Circulating Fulus, Obsolete Coins and Money-Changer Exchanges
أعطني بنصفه فلوسا وبنصفه نصفا إلا حبة
Translation: Give me fulus for one half of it, and for the other half a half-dirham silver piece minus one grain.
The repetition of bi-nisfihi ('for half of it') is decisive. Half of the original dirham is expressly assigned to the fulus, and the other half to a silver piece weighing one grain less than half a dirham.
A grain (habbah) is a small historical weight unit; no fixed modern gram equivalent is asserted here.