《太平广记·卷五百·杂录八》
原来那天村里人到这纳税，就在那地上做粥，锅里还有剩余，狗就把头伸到中空的器具里，却不能脱出来。
盖其日庄上人输税至此，就于其地而糜，釜尚有余者，故犬以首入空器中，而不能出也。
It turned out that the villagers came to pay taxes that day, so they were cooking porridge on the ground. There was still some left in the pot, and the dog put its head in the hollow utensil, but could not get it out.