The Qur'an was brought down by Jibril, not Shaytan

Allah tells us about His Book, which falsehood cannot approach from before or behind it, sent down by the All-Wise, Worthy of all praise. He states that it has been brought down by the trustworthy Ruh (i.e., Jibril) who is helped by Allah,

وَمَا تَنَزَّلَتْ بِهِ الشَّيَـطِينُ

أَفَرَ‌أَيْتَ إِن مَّتَّعْنَاهُمْ سِنِينَ ﴿205﴾

So tell me, If We give them enjoyment for years, - 26:205.