《宋史·志·卷三》
虚宿二颗星，是空的厅堂，是冢宰的官，主管死丧时哭泣，又主管北方的城邑居室、庙堂的祭祀、求神祈祷之事。
虚宿二星，为虚堂，冢宰之官也，主死丧哭泣，又主北方邑居、庙堂祭祀祝祷事。
The two stars of Xuxiu are empty halls, the officials of the tombkeeper's office, in charge of weeping at the time of death, and in charge of the sacrificial and prayer activities of the city and temple in the north.