إِنَّ نَاشِئَةَ ٱلَّيۡلِ هِيَ أَشَدُّ وَطۡـٔٗا وَأَقۡوَمُ قِيلًا
Without doubt, the rising up during the night (from sleep): this (is) more potent an exercise (for training the Nafs or Ruh) and more retaining for the statement (or Message recited from the Scripture)
Author: Dr Kamal Omar