What are the sentences that describe "others are ungrateful"?

Kindness is the liver and lungs of a donkey.

The dog bit Lv Dongbin, but they didn't know what to do.

Treat the belly of a gentleman with the heart of a villain.

Dogs take mice and mind their own business.

Salted radish is light and sad.

Bite the hand that feeds you.

I turn my heart to the bright moon, which shines on the ditch.

Good for evil.

Hot face and cold ass.

Only state officials are allowed to set fires, and people are not allowed to light lamps.

Love yourself.

You are an endless dream in my life, and I am the wind that blows away in your life.

Goodwill was struck by lightning.

It's hard to draw bones when drawing tiger skin.

Know people, know faces, but don't know hearts.

The human heart and abdomen are separate.

Those who know me make me worry, and those who don't know me make me want.