Al Muzzammil, 6 Ayah
73:6
إِنَّ نَاشِئَةَ ٱلَّيۡلِ هِيَ أَشَدُّ وَطۡـٔٗا وَأَقۡوَمُ قِيلًا ٦
'Inna Nāshi'ata Al-Layli Hiya 'Ashaddu Waţ'āan Wa 'Aqwamu Qīlāan
Indeed, the hours of the night are more effective for concurrence [of heart and tongue] and more suitable for words.