Al-A’mash (rahimahullaah) said:

”A man who used to speak to the Jinn informed us that they (i.e. the Jinn) said: ”There is none more severe upon us than the one who follows the Sunnah.  As for the people of desires (i.e. the innovators), we play about with them.” 

[Source: Talbees Iblees of Imaam Ibnul Jawzee (rahimahullaah) with the checking of Al-Allaamah Zaid Bin Haadee Al-Madkhalee (may Allaah preserve him) Page: 43]