《太平广记·卷一百三十·报应二十》
到了五月十六日的中午，大家都在休息，急然听着有急促的敲门声，窦凝心中害怕，开门出去一看，原来是被害的小妾。
五月十六日午时，人皆休息，忽闻扣门甚急。
At noon on May 16th, when everybody was having a rest, they suddenly heard a rapid knocking on the door. Dou Ning felt scared and opened the door to take a look. It turned out to be the concubine who had been killed.