一切經音義 21.216

21.216

壇墠形（墠常演反尚書曰為三壇同墠孔注曰築土為壇除地為墠韓詩傳曰墠猶坦言平地也）。

Shape of an altar and cleared ground (cleared ground [墠]: fanqie 常 + 演; the Shangshu states 'making three altars on the same cleared ground'; Kong's commentary states that heaping earth makes an altar, and clearing the ground makes a 墠; the Han Poetry commentary states that 墠 is like flat, meaning level ground).