《资治通鉴·宋纪·宋纪三》
西秦的相国乞伏元基率领骑兵三千人救援乐都。乞伏元基的援兵刚刚进城，沮渠蒙逊的大军也开到了城下，开始攻击，很快就攻陷了乐都外城；切断了乐都城的水源，城中有一半以上的人死于饥渴。
相国元基帅骑三千救乐都，甫入城，而河西兵至，攻其外城，克之；绝其水道，城中饥渴，死者太半。
Western Qin's Prime Minister Murong Yuangi led 3,000 cavalry troops to rescue Ledufirst. As soon as Murong Yuangi's reinforcements entered the city, Juqu Mengxun's army arrived outside the city and began to attack. They quickly captured the outer city of Ledufirst and cut off the city's water supply. More than half of the people in the city died of hunger and thirst.