נֶ֣פֶשׁ עָ֭מֵל עָ֣מְלָה לּ֑וֹ כִּֽי־אָכַ֖ף עָלָ֣יו פִּֽיהוּ׃
노력하는 자는 식욕을 인하여 애쓰나니 이는 그 입이 자기를 독촉함이니라
Rashi
when his mouth forces him When his mouth forces him and demands food, then his labor stands up for him, for he eats what he has already worked for.