What poems describe "brothers betrayed by friends"?

1. The Tale of Pipa written by Gao Ming in Yuan Dynasty.

Original text:

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

The fallen petal intentionally follows the flowing water, and the flowing water has no beloved fallen petal.

Translation:

Originally, my heart went to the bright moon, but why did the bright moon shine on the ditch?

The fallen petal wants to follow the running water, but the running water doesn't like the fallen petal.

Moral: I am kind to you, but you are cold and ungrateful.

My sincere efforts have not been rewarded and respected.