Don’t tell tales out of school

Don’t give away any damaging secrets. Don’t make public anything that should be kept private.

The proverb originated among children. To tell tales out of school was to sneak – to try to keep on good terms with the teacher by betraying other children. One of Mother Goose’s Nursery Rhymes runs:

Your tongue shall be split,
And all the dogs in the town
Shall have a little bit.

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