Terry Pratchett, Neil Gaiman. Good signs (№ 372777)

- Not that I was not agree with you, ' said angel, stepping on the grass. - I just can't not obey. To me this is not permissible, and you know it.
'Me too,' muttered Crawley.
Aziraphale looked at him askance.
- Really? he said. - You're still a demon.
- Yeah. But our disobedience to approve only the most common properties. But in specific cases they take the most stringent measures.
- That is, in case of disobedience to their specific orders?
- That's it. You even can't imagine.