one good turn deserves another
idiomPart ofdeserve
one good turn deserves another — idiom
1. This expression means that if someone helps you, you should help them in return.
1.idiom
Definition
This expression means that if someone helps you, you should help them in return.
Example
Sara helped me with my project, so I helped her with hers—one good turn deserves another.
When my neighbor fixed my fence, I baked him cookies because one good turn deserves another.