בּוֹר שֶׁשָּׁתִיתָ מִמֶּנּוּ אַל תִּזְרֹק בּוֹ אֶבֶן

ביטוי (אנגלית)

Do not throw a stone into the well from which you have drunk/ cast not dirt into the well that gives you water/ do not bite the hand that feeds you

הגדרה (אנגלית)

Figuratively: Do not be ungrateful. A place from which you have learned or received something good should not be slandered or harmed in any way. (Literally: Do not throw a stone into the well from which you have drunk, for by doing so you might destroy it.)

('Is it not a saying of people: In a well that you drank from, do not throw in a stone? He replied, as it is written (Deuteronomy 23) You Shall Not Abhor an Edomite for He is Your Brother, Nor Shall You Abhor an Egyptian, for You Were a Stranger in His Land' - Baba Kamma 92b. And Likewise: 'But Because He Grew Up in the Land of Midian, He Said: It Is Not Just that I Should Afflict One Who Did a Good Deed for Me, The Proverb Says: A Well You Drank From, Do Not Throw a Stone In' - Midrash Rabbah 22.")