《太平广记·卷三百零五·神十五》
神如果想见窦参。必然在一个空屋里摆上酒席，周围用帐幕围上。
其神欲相见，必具盛馔于空室之内，围以帘幕。
If the god wanted to see Dou Can, he would definitely arrange for a banquet in an empty house, with curtains hung around the perimeter.