Ashamba haanokorerwi.

Zvinorehwa

Rubatsiro runofanira kuuya panguva yakakodzera; hazvina musoro kubatsira munhu mushure mekunge basa rapera.

What it means

Help should be given at the right time; there is no sense in assisting someone after the task is already done.

Word for word

One who has already washed is not scrubbed again.