《资治通鉴·齐纪·齐纪九》
薛真度劝裴叔业及早投降过来，说： 如果事情紧迫才来投降，那么功劳就小了，赏封也就不会多重了。 
真度劝其早降，曰： 若事迫而来，则功微赏薄矣。 
Xue Zhendu urged Pei Shuyue to surrender as soon as possible, saying: If you wait until things become more urgent before surrendering, then your contributions will be small, and your rewards will not be abundant.