《逸周书·卷六·月令解》
上旬的丁日，命令乐正进入国学教练舞蹈，把彩帛放在前边行祭祀先师的礼节。
上丁，命乐正入舞舍采。
On the Fourth day of the first decade, the head of the Board of Music is ordered to enter the National Academy and teach the dance, setting up the colored silk banners in front of the hall to perform the sacrifice to the Master.