《仪礼·觐礼》
摈者四次传命，天子乘坐龙马驾的车，车上载着太常旗，旗上画有日月升龙、降龙的图案。
四传摈。天子乘龙，载大旂，像日月、升龙、降龙；出，拜日于东门之外，反祀方明。
The introducers four times delivered the message; and the son of Heaven, in his carriage drawn by dragons, with the carriage-banner of the grand-administrator attached to it, on which were represented the sun and moon, with the dragons ascending and descending,