《宋书·志·卷三十一》
瓿甄是一种瓦器，比瓯小。晋明帝太宁初年，童谣唱道： 恻力恻力，放马山侧。
瓿甊，瓦器，又小于甒也。晋明帝太宁初，童谣歌曰： 恻力恻力，放马山侧。
"Pu can" is a kind of pottery, smaller than "ou". In the early years of Emperor Ming of Jin Taiping, the children's song sang: "Yi Li Yi Li, let the horse go to the side of the mountain."