《史记·八书·乐书》
因此《商》这首歌，虽是五帝留传下来的，但商人记述下来，用以摅己心胸，陈己品德，所以叫做《商》歌；《齐》这首歌，是三代留传下来的，齐人记述下来，所以称为《齐》歌。
故《商》者，五帝之遗声也，商人志之，故谓之《商》；《齐》者，三代之遗声也，齐人志之，故谓之《齐》。
Therefore, although the song "Shang" is a legacy of the five emperors, but businessmen wrote it down, to express their hearts and morals, so it is called the song "Shang"; the song "Qi" is a legacy of the three generations, and the people of Qi wrote it down, so it is called the "Qi" song.