《北史·列传·卷四十一》
有人报告，说彭乐叛变了。高欢说： 他背弃韩楼归顺尔朱荣，又背叛尔朱荣投降于我，现在又背叛我向西魏投降。
人告乐叛，神武曰： 乐弃韩楼事尔硃荣，背尔硃归我，又叛入西。
Someone reported that Peng Le had rebelled. Gao Huan said: He betrayed Han Lou and surrendered to Erzhu Rong, then betrayed Erzhu Rong and surrendered to me, now he has betrayed me again and surrendered to the Western Wei.