《资治通鉴·隋纪·隋纪八》
当时军队的士兵都是新近招募的，没有经过训练检阅。李建成、李世民与士卒同甘苦，遇到敌人身先士卒，附近道旁的蔬菜瓜果，不是买的不准吃，兵士有偷吃的，立刻找物主进行赔偿，也不责备偷窃者，士兵及百姓们都心悦诚服。
时军士新集，咸未阅习，建成、世民与之同甘苦，遇敌则以身先之。近道菜果，非买不食，军士有窃之者，辄求其主偿之，亦不诘窃者，军士及民皆感悦。
At that time, the soldiers in the army were all newly recruited and had not undergone any training or inspections. Li Jiancheng and Li Shimin suffered with the soldiers and led the charge when encountering enemies. They paid for the vegetables and melons from the nearby roadside and did not blame those who stole them. Even if they paid, they would immediately find the owner to compensate for it, so the soldiers and the people were all willing to obey them.