For Abu Hanifa, a voluntary exit remains an obligation after the final sitting; the twelve intervening changes therefore arise while the prayer is still legally ongoing.
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Abu Hanifa’s principle: exiting by one’s own act
Hadath during Prayer: Building, Restarting and Twelve Final-Sitting Cases
For Abu Hanifa, a voluntary exit remains an obligation after the final sitting; the twelve intervening changes therefore arise while the prayer is still legally ongoing.