An exhortation to be done, to desist: More than a few descendants of immigrants are saying enough is enough(1546+)
The Dictionary of American Slang, Fourth Edition by Barbara Ann Kipfer, PhD. and Robert L. Chapman, Ph.D. Copyright (C) 2007 by HarperCollins Publishers. Cite This Source
Idioms and Phrases with enough is enough
One should be satisfied; stop, there should be no more. For example, No more speeches—enough is enough, or as Robert Southey put it (The Doctor, 1834): “As for money, enough is enough; no man can enjoy more.” This expression already appeared in John Heywood's proverb collection of 1546 and is often used as an interjection (first example).