《北史·列传·卷六十七》
这时，王世充又得知炀帝喜好女色，就进言说江淮善良之家有很多美女，都愿意进入后宫，只是没有缘由自我进献。
时世充又知帝好内，乃言江淮良家多有美女，愿备后庭，无由自进。
At that time, Wang Shichong knew that Emperor Yang liked women, so he told him that there were many beauties in noble families in the Jianghuai area and that they were willing to enter the palace but didn't have a reason to offer themselves.