وَمِنَ اللَّيْلِ فَسَبِّحْهُ وَأَدْبَارَ السُّجُودِ
[50:40]
And glorify Him in the night and after the prayers.
And during part of the night, (also,) celebrate His praises, and (so likewise) after the postures of adoration.
And in the night-time hymn His praise, and after the (prescribed) prostrations.