釋鑑稽古略續集 1.104

1.104

三垣　天象之開有三垣。一曰紫微垣十五星。在太乙之中。二曰太微垣十星。在軫翼之北。三曰天市垣二十二星。在房星之北。

The Three Enclosures: In celestial phenomena, there are Three Enclosures: first, the Purple Forbidden Enclosure of fifteen stars, in the center of the Taiyi; second, the Supreme Palace Enclosure of ten stars, north of Zhen and Yi; third, the Celestial Market Enclosure of twenty-two stars, north of the Fang mansion.