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Phrase(s): A little (hard) work never hurt anyone. [and] A little (hard) work never killed anyone.
Prov. One should expect to do hard or difficult work and not avoid doing it. • Go help your father with the yard work. A little hard work never hurt anyone. • Go ahead. Bring me some more bricks. A little work never killed anyone.
McGrawhill's American Idioms And Phrasal Verbs