רָ֗אשׁ עֹשֶׂ֥ה כַף־רְמִיָּ֑ה וְיַ֖ד חָרוּצִ֣ים תַּעֲשִֽׁיר׃
手行詭詐的，必致貧窮；殷勤人的手，卻使人富足。
Rashi
A poor man makes a deceitful scale Whoever is impoverished in [his knowledge of] Torah promulgates false decisions.
Rashi
deceitful scales Scales of deceit. According to its simple meaning, it refers to merchants.
Rashi
and the hand of those who make true decisions The upright, who decide a matter truly and justly without injustice.