Meaning of the word "he who sups with the devil should have a long spoon" in English

What does "he who sups with the devil should have a long spoon" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

he who sups with the devil should have a long spoon

US /hiː huː sʌps wɪð ðə ˈdɛvəl ʃʊd hæv ə lɔŋ spuːn/
UK /hiː huː sʌps wɪð ðə ˈdɛvəl ʃʊd hæv ə lɒŋ spuːn/
"he who sups with the devil should have a long spoon" picture

Idiom

if you deal with dangerous or untrustworthy people, you must be very careful and keep your distance

Example:
He is a powerful but corrupt businessman; remember, he who sups with the devil should have a long spoon.
I wouldn't trust that political alliance; he who sups with the devil should have a long spoon.