《资治通鉴·后周纪·后周纪四》
丁丑，世宗到达修缮场所，看到役徒有使用木片削成的勺子，在瓦片中盛饭吃的，勃然大怒，将孙延希在街市斩首。
丁丑，帝至其所，见役徒有削柿为匕，瓦中啖饭者，大怒，斩延希于市。
On the day of Ding Chou, Emperor Shizong arrived at the restoration site and saw that the laborers were using wooden spoons and eating rice from tiles. He became furious and had Sun Yanxi beheaded in the market.