Al-Muzzammil • BN-TAFSEER-IBN-E-KASEER
﴿ إِنَّ نَاشِئَةَ ٱلَّيْلِ هِىَ أَشَدُّ وَطْـًۭٔا وَأَقْوَمُ قِيلًا ﴾
“[and,] verily, the hours of night the mind most strongly and speak with the clearest voice,”
Please check ayah 73:9 for complete tafsir.