《北史·列传·卷五十一》
由于过度劳累，便积成疾病，大统十三年在官位上去世，享年四十九岁。
积思劳倦，遂成气疾。十二年，卒于位，时年四十九。
Due to excessive fatigue, he became ill and died in his official position in the thirteenth year of Datong, at the age of forty-nine.
<s>[INST] Render the following Classical Chinese text into fluent English: 积思劳倦，遂成气疾。十二年，卒于位，时年四十九。 [/INST] Due to excessive fatigue, he became ill and died in his official position in the thirteenth year of Datong, at the age of forty-nine.</s>
Render the following Classical Chinese text into fluent English: 积思劳倦，遂成气疾。十二年，卒于位，时年四十九。
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Due to excessive fatigue, he became ill and died in his official position in the thirteenth year of Datong, at the age of forty-nine.
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