Sow the wind and reap the whirlwind
Warns that reckless or harmful actions will bring serious consequences. Identical in meaning to the English proverb.
If you treat people like that, you'll sow the wind and reap the whirlwind.
With those decisions they sowed the wind and now they're reaping the whirlwind.
—How did he end up in this situation? —He sowed the wind and reaped the whirlwind.