Proverbs 19:15 Commentary: Rashi

Laziness causes one to fall into a deep sleep Laziness causes one to fall asleep. This is the figure, but the allegory is that it concerns one who neglects his studies; it will ultimately come about that people will ask him words of wisdom, and he will be sound asleep.

and a deceitful soul shall suffer hunger He will ultimately become poor. Similarly, one who is deceitful in his studies, making his Torah into “bundles,” will ultimately forget.