《仪礼·士丧礼》
甸人在两阶之间掘坎，坎偏于西阶一方；在西墙下用上块垒灶，灶口向东。
甸人掘坎于阶间，少西。
The Dian people dug a pit between the two steps, the pit being on the west side; a stove was built in the northwest corner with the opening facing east.