1
general::
Phrase(s): He who sups with the devil should have a long spoon.
Prov. If you have dealings with dangerous people, you must be careful that they do not harm you. • If you’re going to hang out with that disreputable bunch of people, keep in mind that he who sups with the devil should have a long spoon.
McGrawhill's American Idioms And Phrasal Verbs