Reap what you sow

To reap what you sow means that your actions bring their own results. Good actions tend to lead to good outcomes, and harmful actions often lead to trouble later.

The phrase comes from farming. A farmer harvests the same crop that was planted in the field months earlier. The saying uses that image to explain how choices lead to consequences.

After ignoring the warning signs for months, he finally had to reap what he had sown.