﴿ إِنَّ نَاشِئَةَ ٱلَّيْلِ هِىَ أَشَدُّ وَطْـًۭٔا وَأَقْوَمُ قِيلًا ﴾

“[and,] verily, the hours of night the mind most strongly and speak with the clearest voice,”

Assuredly rising in the night to wake up after having been in sleep is firmer in tread more conducive to establishing harmony between the hearing and the heart for the purpose of comprehending the Qur’ān and more upright in respect to speech clearer for utterance of devotions.