Witr is a night prayer associated with Isha, but entry of prayer time and the order of performing prayers are distinct questions.
Ordinarily, Isha is performed first and Witr afterwards. Performing Witr before Isha raises a separate legal question about order; the mere presence of night does not remove it.
Delaying Witr to late night may be recommended for someone likely to rise, but the time should not be allowed to expire at dawn.
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Prayer Times and Recommended Times
Witr is a night prayer associated with Isha, but entry of prayer time and the order of performing prayers are distinct questions.
Ordinarily, Isha is performed first and Witr afterwards. Performing Witr before Isha raises a separate legal question about order; the mere presence of night does not remove it.
Delaying Witr to late night may be recommended for someone likely to rise, but the time should not be allowed to expire at dawn.