續一切經音義 9.174

9.174

楔木（上先結反切韻云木楔也即以楔去楔也律文作榍謂門閫也非木楔義）。

楔木 (The first character has the fanqie 先結 [xiē]. The Qieyun states: 'A wooden wedge; that is, using a wedge to remove a wedge.' In the Vinaya text it is written as 榍, meaning a doorsill, which is not the sense of a wooden wedge.).