Is there a prohibition against interlacing the fingers or cracking them in prayer, before it, or after it?
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The questioner : The last questioner asks: What is the ruling on cracking the fingers in the mosque?
The Shaykh : In the mosque?
The questioner: Yes.
The Shaykh : In prayer, it is prohibited. As for in the mosque, we have no explicit text, but here it is possible to apply analogical reasoning and consideration. It is established that interlacing the fingers is prohibited, not specifically in prayer, but rather as one prepares for prayer and waits for it. So, cracking the fingers can be equated with interlacing them. If one is waiting for prayer, he should not crack his fingers. However, if he has finished the prayer, it is permissible because there is no prohibition in that case.
The Shaykh : In the mosque?
The questioner: Yes.
The Shaykh : In prayer, it is prohibited. As for in the mosque, we have no explicit text, but here it is possible to apply analogical reasoning and consideration. It is established that interlacing the fingers is prohibited, not specifically in prayer, but rather as one prepares for prayer and waits for it. So, cracking the fingers can be equated with interlacing them. If one is waiting for prayer, he should not crack his fingers. However, if he has finished the prayer, it is permissible because there is no prohibition in that case.
Source
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