From the fruit of his mouth a man eats what is good, but the appetite of the treacherous is for violence.
In context
1A wise son heeds a father’s discipline, but a scoffer does not listen to rebuke. 2From the fruit of his mouth a man eats what is good, but the appetite of the treacherous is for violence. 3Whoever guards his mouth preserves his life; whoever opens his lips wide brings ruin on himself. 4The sluggard craves and gets nothing, but the appetite of the diligent is richly satisfied.