Too much hard work without time out for play or enjoyment is not good for anyone. - A proverb. * /Bill's mother told him to stop studying and to go out and play, because all work and no play makes Jack a dull boy./
ALL WORK AND NO PLAY MAKES JACK A DULL BOY
Meaning of ALL WORK AND NO PLAY MAKES JACK A DULL BOY in English
Dictionary of English idioms . Словарь английских идиом. 2012