Dr. Mustafa Khattab, the Clear Quran - Surah Al-Muzzammil, ayah 6

Translation of Surah Al-Muzzammil, ayah 6 (73:6)

إِنَّ نَاشِئَةَ ٱلَّيۡلِ هِيَ أَشَدُّ وَطۡـٔٗا وَأَقۡوَمُ قِيلًا ٦
Indeed, worship in the night is more impactful and suitable for recitation.