《宋书·志·卷十七》
寻思宫中发生变故，即使不是居丧期间，也停止祭祀三个月，居丧不举行祭祀。
寻宫中有故，虽在无服，亦废祭三月，有丧不祭。
If there is an accident in the palace, even if it is not during the funeral period, the sacrifice shall be stopped for three months, and no sacrifice shall be held during the funeral period.