Quduri differentiates vomiting that overtakes a person involuntarily from deliberately inducing a mouthful of vomit. The first does not invalidate the fast; the second requires qaḍāʾ.
The phrase “mouthful” is a substantive condition. This wording must not be expanded to claim the exact same rule for all amounts of deliberate vomiting.
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Kitab al-Sawm: Fasting Hours, Invalidators, Qada and Kaffarah
Quduri differentiates vomiting that overtakes a person involuntarily from deliberately inducing a mouthful of vomit. The first does not invalidate the fast; the second requires qaḍāʾ.
The phrase “mouthful” is a substantive condition. This wording must not be expanded to claim the exact same rule for all amounts of deliberate vomiting.