ʿUyūn akhbār al-Riḍā - Volume 1 > Various Traditions From al-Ridha (s)
Hadith #19

19 - حَدَّثَنا أَبي رَضِىَ اللهُ عَنْهُ قالَ: حَدَّثَنا سَعْدِ بْنِ عَبْدِ اللَّه، عَن أَحْمَدِ بْنِ مُحَمَّدِ بْنِ عِيسَى عَنِ الحَسَن بن عَلِيِّ الوَشَّاء، عَن أَبي الحَسَن الرِّضا عَلَيْهِ السَّلامُ قالَ: سَمِعْتُهُ يَقُولُ: إِذَا نَامَ الْعَبْدُ وَهُوَسَاجِدٌ قَالَ اللَّهُ عَزَّ وَجَلَّ لِلْمَلائِكَةِ انْظُرُوا إِلَى عَبْدِي قَبَضْتُ رُوحَهُ وَهُوَفِي طَاعَتِي.

30-19 (The author of the book narrated) my father - may God be pleased with him - narrated that Sa’d ibn Abdullah quoted on the authority of Ahmad ibn Muhammad ibn Isa, on the authority of Al-Hassan ibn Ali al-Washsha’ that he had heard Abil Hassan Al-Ridha (s) say, “Whenever a servant (i.e. a person) falls asleep while he is prostrating, the Honorable the Exalted God will tell the angels: Look at My servant! I took away his soul while he was obeying Me.”