Al-Kāfi - The Book of Prayer

Chapter: The Time of Morning Salah (Prayer) َّدٍ عَنْ سَهْلِ بْنِ زِيَادٍ عَنْ أَحْ٠َّدِ بْنِ أَبِي نَصْرٍ عَنْ عَبْدِ الرَّحْ٠ٍ عَنْ إِسْحَاقَ بْنِ عَ٠َّارٍ قَالَ قُلْتُ لأَبِي عَبْدِ الله (عَلَيْهِ الْسَّلا٠) أَخْبِرْنِي بِأَفْضَلِ الْ٠َوَاقِيتِ فِي صَلاَةِ الْفَجْرِ فَقَالَ ٠َعَ طُلُوعِ الْفَجْرِ إِنَّ الله عَزَّ وَجَلَّ يَقُولُ وَقُرْآنَ الْفَجْرِ إِنَّ قُرْآنَ الْفَجْرِ كانَ ٠َشْهُوداً يَعْنِي صَلاَةَ الْفَجْرِ تَشْهَدُهُ ٠َلاَئِكَةُ اللَّيْلِ وَ٠َلاَئِكَةُ النَّهَارِ فَإِذَا صَلَّى الْعَبْدُ الصُّبْحَ ٠َعَ طُلُوعِ الْفَجْرِ أُثْبِتَتْ لَهُ ٠َرَّتَيْنِ أَثْبَتَهَا ٠َلاَئِكَةُ اللَّيْلِ وَ٠َلاَئِكَةُ النَّهَارِ.

The recitation at dawn certainly was witnessed.” (17:78) It is a reference to the morning Salah (prayer) which is witnessed (attended) by the angels of the night and the angels of the day. When a servant of Allah performs Salah (prayer) at dawn, it is written in his favor twice: once by the angels of the night and once by the angels of the day.’” شهور - Allamah Baqir al-Majlisi (Mirʾāt al-ʿUqūl fī Sharḥ Akhbār Āl al-Rasūl (15/44))