《北史·列传·卷六十三》
开皇十八年，突厥兵进犯边塞，朝廷任命李安为行军总管，跟从杨素打击突厥军队。
十八年，突厥犯塞，以安为行军总管，从杨素击之。
In the eighteenth year of the Kaihuang reign, the Turks invaded the border, and the imperial court appointed Li An as the chief commander of the army, and followed Yang Su to attack the Turks.