The Reward of the Night Prayer
Man Lā Yaḥḍuruh al-Faqīh|Volume 1|Book 1|Chapter 65
وَ رَوَى هِشَامُ بْنُ سَالِمٍ عَنْهُ أَنَّهُ قَالَ: فِي قَوْلِ اَللَّهِ عَزَّ وَ جَلَّ: «إِنَّ نٰاشِئَةَ اَللَّيْلِ هِيَ أَشَدُّ وَطْئاً وَ أَقْوَمُ قِيلاً » قَالَ «قِيَامُ اَلرَّجُلِ عَنْ فِرَاشِهِ يُرِيدُ بِهِ وَجْهَ اَللَّهِ عَزَّ وَ جَلَّ لاَ يُرِيدُ بِهِ غَيْرَهُ.
Hisham ibn Salim reported that Imam عليه السلام said regarding the words of Allah سبحانه وتعالى, the Mighty and Majestic: "Indeed, the rising by night is [more effective] for concurrence [of heart and tongue] and more suitable for words" (Surah Al-Qiyamah 73:6). Imam عليه السلام said: "It refers to a person rising from their bed for the sake of Allah سبحانه وتعالى, the Mighty and Majestic, seeking nothing but His pleasure.
- Ṣaḥīḥ al-Faqīh, p. 68