a dog that will (bring|fetch) a bone will carry a bone
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used to imply that a person who shares gossip with one cannot be trusted, as they are likely to spread gossip about one as well
The origin of the proverb "a dog that will bring a bone will carry a bone" is unclear, but it aligns with similar expressions found in various cultures. The saying serves as a warning to be cautious when someone is eager to share information, as their actions may reflect their overall character and lack of discretion. It serves as a reminder to be selective about who is trusted with sensitive or personal information.
- She's always spreading rumors about others behind their backs, so I don't trust her at all - a dog that will bring a bone will carry a bone.