一切經音義 18.160

18.160

底沙（丁以反或云補沙唐云鬼宿即其人是此宿直日生西方以二十八宿記日但以月所臨宿因以為名舊經云蛭數者是也）。

Tiṣya (底沙: ding-yi fan; also called Puṣya [補沙]; in the Tang language: "the Ghost lunar mansion" [gui su]. Namely, the person was born on the day ruled by this asterism. In the Western regions, they record days according to the twenty-eight lunar mansions, simply naming [a person] based on the mansion where the moon is located. The older sūtras say Zhi-shu [蛭數], which is this [same name]).