《新唐书·列传·卷一百四十五》
又献二女。皇帝说： 姑娘们都是王姑姐妹，来此要改变原来的习俗，离别亲人。我不忍心留下她们。 
又献二女，帝曰： 女皆王姑姊妹，违本俗，别所亲，朕不忍留。 
He also offered two daughters. The emperor said, "The ladies are both sisters of the royal family, and their coming here means they must be alienated from their family and customs. I cannot bear to let them stay."