《仪礼·大射仪》
在射布西边十步、北边十步的位置上设置躲避箭矢的器具，凡是用来躲避箭矢的器具都用皮革制成。
设乏西十、北十，凡乏用革。
There are facilities for hiding from arrows ten steps to the west and ten steps to the north of the target. All facilities for hiding from arrows are made of leather.