Don't bite the hand that feeds you

tʃaɪniːzle̞tə o̞ tʃaɪniːzle̞tə te̞ dʒapəniːzle̞tə tʃaɪniːzle̞tə sɯᵝ nä

In Japanese 恩を仇で返すな

This idiom is used in Japanese to express the importance of gratitude and avoiding betrayal.