Does licking the lips with the tongue out of intense thirst invalidate the fast, and does this fall under the ruling of expelling and returning saliva, which invalidates the fast, and does it invalidate the fast of one who is accustomed to doing so in hot weather?
Merely licking the lip with the tongue does not invalidate the fast, nor does it necessitate expelling saliva. Expelling saliva and returning it does not break the fast.
Summarized from the full answer at Ftawy · reviewed Sep 2, 2026
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