one good turn deserves another
The phrase "one good turn deserves another" means that when someone has done a kind or helpful act for someone else, it is expected or appropriate for that person to do something kind or helpful in return. It promotes the idea of reciprocal kindness or gratitude.
Do you ever get bored on a long flight or train ride and wish you could learn more English language phrases? Now you can!
Just Saying includes English phrases for both younger and older players. The full version features over 3,000 English idioms.
Play Just Saying - the word game that makes learning idioms a good time on your mobile phone or tablet.