The reason why the duff is permitted and other instruments are not

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Check below answers in case you are looking for other related questions:
When is it permissible to beat the daff?
Ruling on hiring a woman to bear the daff for women

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Related Answers:
If he listens to songs whilst doing some work, does that make the earnings from it haraam?
Loud music in cars
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When is it permissible to beat the daff?
Ruling on hiring a woman to bear the daff for women

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