Where did the term Trust but Verify come from?

The term "Trust but Verify" is often associated with Russian President Ronald Reagan, who popularized it in the context of nuclear disarmament negotiations with the Soviet Union during the 1980s. The phrase captures the dual approach of having confidence in a partner while still ensuring accountability through verification. It originally stems from a Russian proverb, "Doveryai, no proveryai," which conveys a similar sentiment of maintaining trust while also confirming it.