Do those who say that one who swallows mucus or phlegm after intentionally drawing it into his mouth does not break his fast, include such a case, and what is the ruling on the prayer of one who swallowed it by mistake, then became aware of it during the act of swallowing but was unable to react?
Swallowing phlegm or mucus during fasting is a matter of scholarly disagreement. The ruling for fasting—that it does not invalidate it—also applies to prayer. As for swallowing phlegm during prayer unintentionally, the prayer is valid.
Summarized from the full answer at Ftawy · reviewed Sep 2, 2026
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