bite the hand that feeds one

1.
USUKAustraliaCanadaproverbialneutralformal
- to act against or show ingratitude toward someone who has helped or supports you.
- to harm, criticize, or betray a person or organization on whom one depends.

Examples:

EN: I haven't been well-educated, but I know very well people can't bite the hand that feeds one.
ES: Puede que no haya leído la compilación del código de ética confuciano de forma intensiva, ¡pero soy plenamente consciente de que no debo morder la mano que me ha alimentado!
ID: Meskipun saya belum belajar ajaran etika, namun, saya juga tahu, tak boleh balas budi dengan kejahatan.
EN: How can they simply bite the hand that feeds one?
ID: Baik dibalas jahat, masih bisa diterima.