《仪礼·大射仪》
大夫的席位挨着小卿的席位也以东边为上位。如果有面朝东的席就以北边为上位。
大夫继而东上，若有东面者，则北上。
The seats of great officers were next to the seats of the minor ministers and also had the east as the honored side. If there were seats facing the east, the north side was the honored side.