《周礼·春官宗伯·大司乐&小师》
凡有道艺、有德行的人，让他们在学校任教，死了就奉之为乐祖，在学校祭祀他们。
凡有道者，有德者，使教焉。死则以为乐祖，祭於瞽宗。
Anyone who has the art and morality, let them teach in the school, and when they die, they will be enshrined as the ancestors of music and worshipped in the school.