זָרְעוּ חִטִּים וְקֹצִים קָצָרוּ

ביטוי (אנגלית)

They sowed wheat and reaped thorns

הגדרה (אנגלית)

In the question: All labor will come to naught. Disappointment over effort that bears no fruit.

("Sow wheat and reap thorns, they will wither, they will not prosper, and you will be ashamed of your harvest because of the fierce anger of the Lord" - Jeremiah 12:13)