《史记·三十世家·外戚世家》
又问他还能用什么来验证，他回答说： 姐姐离开我西去的时候，和我在驿站宿舍里诀别，姐姐讨来米汤给我洗头，又要来食物给我吃，然后才离去。 
又复问他何以为验。对曰： 姊去我西时，与我决于传舍中，丐沐沐我，请食饭我，乃去。 
Guangguo was asked again if there was any other proof, he replied: When my sister left me and went to the west, we parted ways at a驿站, my sister asked for some rice soup to wash my hair, and asked for some food to feed me, and then she left.