李世勣
Historical accounts indicated that at one point, when Li Shiji was suddenly ill, medical books indicated that ashes from beards could benefit him, and therefore Emperor Taizong cut off his own beard and burned it to mix it with the medicine. After Li Shiji grew better, he bowed to thank Emperor Taizong—so greatly that he bled from his forehead by pounding on the floor—and Emperor Taizong responded, "I did so for the empire, not for you. You do not need to thank me." Further, on one occasion, when Li Shiji was attending an imperial feast, Emperor Taizong stated: "I am selecting, among the great achievers, one that I can entrust an orphan [(i.e., the Crown Prince)] to, and no one is more suitable than you are. You did not turn your back on Li Mi, and I know that you will not turn your back on me." Li shiji was so thankful that he wept and bit his finger so hard that he bled. Also at that feast, when Li Shiji became drunk and fell asleep, Emperor Taizong took off his own imperial robe to cover Li Shiji.