《元史·列传·卷六十九》
皇上下诏修辽、金、宋三代历史，玄任总裁官。
已而乞致仕，帝复不允。
Emperor's edict: Compile the histories of Liao, Jin and Song Dynasties, and appointed Xuan as the main editor.
<s>[INST] Render the following Classical Chinese text into fluent English: 已而乞致仕，帝复不允。 [/INST] Emperor's edict: Compile the histories of Liao, Jin and Song Dynasties, and appointed Xuan as the main editor.</s>
Render the following Classical Chinese text into fluent English: 已而乞致仕，帝复不允。
user
Emperor's edict: Compile the histories of Liao, Jin and Song Dynasties, and appointed Xuan as the main editor.
assistant