經律異相 1.104

1.104

雲有四種。一白。二黑。三赤。四紅。白者地大偏多。黑者水大偏多。赤者火大偏多。紅者風大偏多。去地或十里。或二十三十。乃至四十里。除劫初時上至光音天（出長阿含經第二十卷）雲有四色。一青。二赤。三黃白。四黑。青者中有水界大多。赤者中有火界大多。黃白者中有地界大多。黑者中有風界大多（出樓炭經第四卷）龍氣為雲（出長阿含經）。

There are four kinds of clouds: first, white; second, black; third, red; fourth, crimson. White clouds have a predominance of the earth element; black have a predominance of the water element; red have a predominance of the fire element; crimson have a predominance of the wind element. They are ten li, twenty, thirty, or up to forty li from the earth, except at the beginning of a kalpa when they reach up to the Ābhāsvara heaven. (From the Dīrgha-āgama, fascicle 20.) There are four colors of clouds: first, blue; second, red; third, yellow-white; fourth, black. The blue ones have a great predominance of the water element; the red ones have a great predominance of the fire element; the yellow-white ones have a great predominance of the earth element; the black ones have a great predominance of the wind element. (From the Loutan jing, fascicle 4.) The vapor of dragons makes clouds. (From the Dīrgha-āgama.)