אַל תִּזְרֹק אֶבֶן לַבּוֹר שֶׁשָּׁתִיתָ מִמֶּנּוּ

ביטוי (אנגלית)

Do not throw a stone into the well from which you drank

הגדרה (אנגלית)

See: "A well from which you have drunk, do not throw a stone into it".

-