Case one: an earlier unperformed prostration and the same verse repeated inside prayer may be covered by one act. Case two: if the first act was already performed, the later recitation requires another. Case three: repeating one verse in a single gathering requires one prostration.
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Application: one verse recited twice
Prostration of Recitation: Locations, Obligation, Hearing and Performance
Case one: an earlier unperformed prostration and the same verse repeated inside prayer may be covered by one act. Case two: if the first act was already performed, the later recitation requires another. Case three: repeating one verse in a single gathering requires one prostration.