Stood watch all night without getting tired

For the journey to the capital, a carriage was prepared for the two ladies, and Guan Yu was its guard. On the road they rested at a certain post station, and Cao Cao, anxious to compromise Guan Yu by beguiling him into forgetfulness of his duty, assigned Guan Yu to the same apartment as his sisters-in-law. Guan Yu stood the whole night before the door with a lighted candle in his hand. Not once did he yield to fatigue. Cao Cao’s respect for him could not but increase (Romance of the Three Kingdoms, Ch 25).