一切經音義 23.63

23.63

伺其過失（伺相吏反鄭玄注周禮曰伺猶察也玉篇曰伺侯也方言曰伺視也自關而北凡竊相視謂之伺也）。

Spying out his faults (伺其過失: 伺 is read 相 + 吏 fanqie. Zheng Xuan's commentary on the Zhouli says: '伺 is like inspecting.' The Yupian says: '伺 means to wait for.' The Fangyan says: '伺 means to watch. From the Pass northward, whenever people look at each other stealthily, it is called ci (伺).').