Beginning a voluntary act and undertaking a vow are not the same legal trigger. This passage addresses the binding effect of commencement; a vow is governed by its own conditions.
If the fast was already obligatory or was itself a make-up fast, it should not be relabeled as voluntary to apply an inapplicable rule. Classify the act before deciding the consequence.
Opening interactive controls...
Kitab al-Sawm: Interrupted Voluntary Worship, Puberty and Conversion
Beginning a voluntary act and undertaking a vow are not the same legal trigger. This passage addresses the binding effect of commencement; a vow is governed by its own conditions.
If the fast was already obligatory or was itself a make-up fast, it should not be relabeled as voluntary to apply an inapplicable rule. Classify the act before deciding the consequence.