As-Saduq denies that the devil was one of the angels

Muhammad Ibn Ali As-Saduq writes:
إِنَّـمَـا أَرَدتُّ أَنْ تَـكُـونَ هَـذِهِ الْـحِـكَـايَـةُ فِـي هَـذَا الْـكِـتَـابِ وَلَـيْـسَ قَـوْلِـي فِـي إِبْـلِـيـسَ أَنَّـهُ كَـانَ مِـنَ الْـمَـلَائِـكَـةِ بَـلْ كَـانَ مِـنَ الْـجِـنِّ إِلَّا أَنَّـهُ كَـانَ يَـعْـبَـدُ الـلَّـهَ بَـيْـنَ الْـمَـلَائِـكَـةِ وَهَـارُوتُ وَمَـارُوتُ مَـلَـكَـانِ وَلَـيْـسَ قَـوْلِـي فِـيـهِـمَـا قَـوْلَ أَهْـلِ الْـحَـشَـوِ بَـلْ كَـانَـا عِـنْـدِي مَـعْـصُـومَـيْـنِ وَمَـعْـنَى هَـذِهِ الْآيَـةِ وَاتَّـبَـعُـوا مَـا تَـتْـلُـو الـشَّـيَـاطِـيـنُ عَـلَـىٰ مُـلْـكِ سُـلَـيْـمَـانَ إِنَّــمَـا هُـوَ وَاتَّـبَـعُـوا مَـا تَـتْـلُـو الـشَّـيَـاطِـيـنُ عَـلَـىٰ مُـلْـكِ سُـلَـيْـمَـانَ وَعَـلَـى مَـا أُنـزِلَ عَـلَـى الْـمَـلَـكَـيْـنِ بِـبَـابِـلَ هَـارُوتَ وَمَـارُوتَ وَقَـدْ أَخْـرَجْـتُ فِـي ذَلِـكَ خَـبَـرًا مُـسْـنَـدًا فِـي كِـتَـابِ عُـيُـونِ أَخْـبَـارِ الـرِّضَـا عَـلَـيْـهِ الـسَّـلَامُ

“I just wanted this narration to be in this book and i do not believe that the devil was one of the angels but he was one of the hidden ones (Jinn) except that he used to serve God among the angels and Harut and Marut were two angels and i am not saying what the Hashawites say about them but i believe that they are infallible and with this verse “They followed what Satan said about the rule of Solomon” (2: 102) merely means: “They followed what Satan propounded about the rule of Solomon and what was sent down to the angels Harut and Marut in Babylon. ” And i have published a complete account of this in the book Uyun Akhbari r-Rida (a.).” [Ilal-ush-Shara’i’, page 33]