The Time for Night Prayer
Man Lā Yaḥḍuruh al-Faqīh|Volume 1|Book 1|Chapter 66
وَ رَوَى أَبُو حَمْزَةَ اَلثُّمَالِيُّ عَنْ أَبِي جَعْفَرٍ عَلَيْهِ اَلسَّلاَمُ أَنَّهُ قَالَ: «مَا نَوَى عَبْدٌ أَنْ يَقُومَ أَيَّةَ سَاعَةٍ نَوَى فَعَلِمَ اَللَّهُ تَبَارَكَ وتَعَالَى ذَلِكَ مِنْهُ إِلاَّ وَكَّلَ بِهِ مَلَكَيْنِ يُحَرِّكَانِهِ تِلْكَ اَلسَّاعَةَ.
Abu Hamzah al-Thumali reported from Imam Muhammad ibn Ali Al-Baqir عليه السلام who said: "There is no servant who intends to rise (for prayer) at any hour they intend, and Allah سبحانه وتعالى, Blessed and Exalted, knows this intention from them, except that He assigns two angels to move them at that hour."
- Ṣaḥīḥ al-Faqīh