以暴易暴

From The Records of the Historian, Vol. 61:

武王已平殷亂，天下宗周，而伯夷、叔齊恥之，義不食周粟，隱於首陽山，采薇而食之。及餓且死，作歌，其辭曰：「登彼西山兮，采其薇矣。以暴易暴兮，不知其非矣！……」 [Classical Chinese, trad.]

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武王已平殷乱，天下宗周，而伯夷、叔齐耻之，义不食周粟，隐于首阳山，采薇而食之。及饿且死，作歌，其辞曰：「登彼西山兮，采其薇矣。以暴易暴兮，不知其非矣！……」 [Classical Chinese, simp.]

From: The Records of the Grand Historian, by Sima Qian, c. 91 BCE

Wǔwáng yǐ píng Yīn luàn, tiānxià zōng Zhōu, ér Bóyí, Shūqí chǐ zhī, yì bù shí Zhōu sù, yǐn yú Shǒuyángshān, cǎiwēi ér shí zhī. Jí è qiě sǐ, zuògē, qí cí yuē: “Dēng bǐ Xīshān xī, cǎi qí wēi yǐ. Yǐbàoyìbào xī, bùzhī qí fēi yǐ!......” [Pinyin]

After King Wu had conquered and pacified the people of the Yin, the world now honored the house of Zhou as its ruler. But Bo Yi and Shu Qi were filled with outrage and considered it unrighteous to eat the grain of Zhou, so they fled and hid on Shouyang Mountain, where they tried to live on ferns they gathered. On the brink of starvation, they sang a song:
We climb this western hill and pick its ferns;
changing a tyranny by violence, he knows nothing about his own fault. ...

以暴易暴

1. to replace one tyranny with another