《太平广记·卷三百四十四·鬼二十》
元和十二年。长安永平里西南角，有一个小宅院，悬挂榜文说，只要有人敢居住，就把房契奉赠给他，只要给他当初的房价。
元和十二年，上都永平里西南隅，有一小宅，悬榜云：但有人敢居，即传元契奉赠，及奉其初价。
The twelfth year of Yuanhe. In the southwest corner of the Yongping Li in Chang'an, there is a small house with a sign hanging outside that says if someone dares to live in it, they will be given a freehold deed as a gift, as long as they give the original price of the house.