Does one fall into disbelief or sin if he says to his friend who asked him for a testimony in a joking context: "Don't say that, it is forbidden," intending to prevent joking about religious matters, not to forbid the testimony itself? Or if he says to him: "Forbidden, this is a book of Fiqh" with a smile upon seeing him carelessly throw a book of Fiqh, due to fear of mockery or ridicule of religion?
Your forbidding your colleague from jesting about the Shahada (testimony of faith) is a form of advice. Your smiling at your colleague's frequent forgetfulness is not mockery of religion; rather, it is merely a [whisper from Satan] (waswasa), and you have been warned against indulging in such whispers, especially in this regard.
Summarized from the full answer at Ftawy · reviewed Sep 2, 2026
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