expression
Abbreviation of the full proverb 急いては事を仕損じる (haste makes waste; rushing leads to failure). Used as a set phrase to caution against haste.
See also: 急いては事を仕損じる
「急いては事を」と言うように、焦ると失敗しやすい。
As the saying goes, 'haste makes waste' — if you rush, you're likely to make mistakes.