Spy Proverbs

At every door-way, ere one enters, one should spy round. (Norse Proverb)
Who doesn't want to stay with friends, is either a cop, a cuckold, or a spy. View proverb
Sicilian Proverb
A spy for both. View proverb
Xhosa Proverb
Don't chat on the phone - a talker is a great find for a spy. View proverb
Russian Proverb