The Reward of the Night Prayer
Man Lā Yaḥḍuruh al-Faqīh|Volume 1|Book 1|Chapter 65
وَقَالَ عَلَيْهِ اَلسَّلاَمُ: فِي قَوْلِ اَللَّهِ عَزَّ وَ جَلَّ: «إِنَّ اَلْحَسَنٰاتِ يُذْهِبْنَ اَلسَّيِّئٰاتِ» قَالَ «صَلاَةُ اَلْمُؤْمِنِ بِاللَّيْلِ تَذْهَبُ بِمَا عَمِلَ مِنْ ذَنْبٍ بِالنَّهَارِ.
Imam عليه السلام said regarding the words of Allah سبحانه وتعالى, the Mighty and Majestic: "Indeed, good deeds remove bad deeds" (Surah Hud 11:114). He عليه السلام explained, "The night prayer of a believer erases the sins committed during the day."
- Ṣaḥīḥ al-Faqīh