大唐西域記 2.9

2.9

夫其潔清自守，非矯其志。凡有饌食，必先盥洗，殘宿不再，食器不傳；瓦木之器，經用必棄；金、銀、銅、鐵，每加摩瑩。饌食既訖，嚼楊枝而為淨。澡漱未終，無相執觸。每有溲溺，必事澡灌。身塗諸香，所謂栴檀、欝金也。君王將浴，鼓奏絃歌。祭祀拜祠，沐浴盥洗。

They are very particular in their personal cleanliness, and allow no remissness in this particular. All wash themselves before eating ; they never use that which has been left over (from a former meal) ; they do not pass the dishes. Wooden and stone vessels, when used, must be destroyed; vessels of gold, silver, copper, or iron after each meal must be rubbed and polished. After eating they cleanse their teeth with a willow stick, and wash their hands and mouth.
Until these ablutions are finished they do not touch one another. Every time they perform the functions of nature they wash their bodies and use perfumes of sandal-wood or turmeric.
When the king washes they strike the drums and sing hymns to the sound of musical instruments. Before offering their religious services and petitions, they wash and bathe themselves.