הֶחְלִיף פָּרָה בַּחֲמוֹר

ביטוי (אנגלית)

To make a bad bargain ("to exchange a cow for a donkey")

הגדרה (אנגלית)

In the question: Make a bad deal (a cow is considered more valuable than a donkey).

("The one who exchanges a cow for a donkey and it gives birth, and the one who sells its offspring and it gives birth, this is what I say, until I sell it, and this is what I say, from the time I take it, they shall divide it" - Baba Matzi'a 8:4)