محسن خان
سورة المزمل · 73:6
إِنَّ نَاشِئَةَ اللَّيْلِ هِيَ أَشَدُّ وَطْئًا وَأَقْوَمُ قِيلًا
Verily, the rising by night (for Tahajjud prayer) is very hard and most potent and good for governing (the soul), and most suitable for (understanding) the Word (of Allah).