Jeong Mong-ju
Jeong Mong-ju (정몽주·1337-1392), considered "father" of Korean neo-Confucianism, was a high minister of Goryeo dynasty when Yi Seong-gye overthrew Goryeo and established Joseon dynasty. He answered with the following sijo to the future Taejong of Joseon when the latter demanded his support for the new dynasty with a poem of his own. Just as he suspected, he was assassinated the same night on April 4, 1392.
이몸이 죽고 죽어 일백 번 고쳐 죽어
백골이 진토되어 넋이라도 있고 없고
임 향한 일편 단심이야 가실 줄이 있으랴.
Should this body die and die again a hundred times over,
White bones turning to dust, with or without trace of soul,
My steadfast heart toward Lord, could it ever fade away?
Read more about this topic: Death Poem, Korean Death Poems