רָ֗אשׁ עֹשֶׂ֥ה כַף־רְמִיָּ֑ה וְיַ֖ד חָרוּצִ֣ים תַּעֲשִֽׁיר׃
손을 게으르게 놀리는 자는 가난하게 되고 손이 부지런한 자는 부하게 되느니라
Rashi
לא יחרץ כלב לשנו NO DOG SHALL חרץ HIS TONGUE — I say that it has the meaning of sharpening: “no dog shall whet his tongue”. So, too: (Joshua 10:21) “לא חרץ his tongue against any of the children of Israel”, i. e. “none whetted”; (II Samuel 5:24) “then תחרץ” — then thou shalt utter a sharp sound; (Isaiah 41:15) “a threshing-sledge חרוץ” i. e. sharp; (Proverbs 21:5) “the plans of a חרוץ” — of “an acute and sharp man”; (Proverbs 10:4) “the hand of the חרוצים maketh rich”, i. e. the hand of the acute — of sharp merchants.
Rashi
honest Heb. חרוץ, one who deals honestly, as in (10:4): “and the hand of those who make true decisions (חרוצים) will make [them] rich.”