Prayer: Willful Delay of Maghrib and Isha
Practical Laws of Islam as per the teachings of Ayatullah Sistani
Ruling 727
If someone wilfully does not perform maghrib or isha prayers by midnight, he must, based on obligatory precaution, perform them before the time of the morning call to prayer (adhān) without making the intention of performing them in their prescribed time (ada) belatedly or (qada).