Reap a/the harvest of (something) phrase
To have, get or reap the benefits or suffer the bad consequences of something that you have done.
You’ve got an F on your test? It sounds like you're reaping the harvest of your laziness
Of course you're exhausted in class! You're reaping the harvest of staying up too late!
John’s reaped the harvest of his effort and determination. He’s recently become the heavyweight champion of the world.
The verb "reap" must be conjugated according to its tense.
The origin of this phrase is not clear.