בְּכָל־עֶ֭צֶב יִהְיֶ֣ה מוֹתָ֑ר וּדְבַר־שְׂ֝פָתַ֗יִם אַךְ־לְמַחְסֽוֹר׃
Tout effort sérieux donne du profit; les vaines paroles ne causent que des pertes.
Rashi
In every toil In every toil of work, there is a gain, but in words of vanity, there is only loss.