The heretics took exception to His words,

“Indeed, My servants—you shall have no authority over them.” (15:42)

and to His address to Iblis:

“Indeed, My servants—you shall have no authority over them.” (15:42)

as well as to Moses’ statement, after he had slain the man:

“This is but the work of Satan.” (28:15)

On the strength of these passages they called the Quran into question and claimed that it is self-contradictory.⦗2⦘