حَافِظُواْ عَلَى الصَّلَوَاتِ والصَّلاَةِ الْوُسْطَى وَقُومُواْ لِلّهِ قَانِتِينَ
[2:238]
Attend constantly to prayers and to the middle prayer and stand up truly obedient to Allah.
Guard strictly your (habit of) prayers, especially the Middle Prayer; and stand before Allah in a devout (frame of mind).
Be guardians of your prayers, and of the midmost prayer, and stand up with devotion to Allah.