Chapter on the Detailed Explanation of Prayer, Including the Obligatory and Recommended, and What is Permissible and Not Permissible.
Tahdhīb al-Aḥkām|Volume 2|Book 1|Chapter 9
Tahdhīb al-Aḥkām
Volume 2, Book 1, Chapter 9
Chapter on the Detailed Explanation of Prayer, Including the Obligatory and Recommended, and What is Permissible and Not Permissible.
وَ عَنْهُ عَنِ اَلْحَسَنِ عَنْ فَضَالَةَ عَنِ اِبْنِ سِنَانٍ قَالَ سَمِعْتُ أَبَا عَبْدِ اَللَّهِ عَلَيْهِ اَلسَّلاَمُ يَقُولُ:« إِنَّ اَلْعَبْدَ يَقُومُ فَيَقْضِي اَلنَّافِلَةَ فَيُعَجِّبُ اَلرَّبُّ مَلاَئِكَتَهُ مِنْهُ فَيَقُولُ« مَلاَئِكَتِي عَبْدِي يَقْضِي مَا لَمْ أَفْتَرِضْهُ عَلَيْهِ»»
And from him, from al-Hasan, from Fadalah, from Ibn Sinan, who said:
I heard Abu Abdillah عليه السلام say: "Indeed, the servant stands and makes up the ‘nafilah’ (recommended prayer), and the Lord عز وجل causes His سبحانه وتعالى angels to marvel at him. He عز وجل says: 'My angels, My servant is making up what I عز وجل did not make obligatory upon him.'"
- Tahdhīb al-Aḥkām fī Sharḥ al-Muqniʿah, vol. 2, p. 175
- Ṣaḥīḥ al-Tahdhīb, p. 204