法苑珠林 7.62

7.62

王玄策行傳云。吐蕃國西南有一涌泉。平地涌出。激水遂高五六尺甚熱。煮肉即熟。氣上衝天像似氣霧。有一老吐蕃云。十年前其水上激。高十餘丈。然始傍散。有一人乘馬逐鹿直赴泉中。自此已來不復高涌。泉中時時見人骸骨涌出。垂𭯭布水須臾即爛。或名為鑊湯。此泉西北六七十里更有一泉。其熱略等。時時盛沸殷若雷聲。諸小泉溫往往皆然。今此震旦諸處多有溫湯。准此亦是鑊湯。故四分律下文佛言。王舍城北有熱湯。從地獄中來。初出甚熱。後流至遠處稍冷。為有餘水相和。所以冷也（右此一驗出西國傳）。

Wang Xuance's Travel Account says: Southwest of the kingdom of Tubo, there is a gushing spring that erupts from the flat ground. The surging water reaches five or six feet high and is extremely hot; meat boiled in it cooks immediately. Its steam shoots up into the sky like mist. An old Tibetan said: Ten years ago, its water surged upward to a height of more than ten fathoms before beginning to disperse to the sides. A man on horseback pursuing a deer rushed straight into the spring; from then on, it no longer surged so high. In the spring, human skeletons are seen gushing out from time to time. If one lowers cloth into the water, it rots in an instant; some call it the "Boiling Cauldron". Sixty or seventy li northwest of this spring, there is another spring whose heat is roughly the same; from time to time it boils violently with a roar like thunder. Various small warm springs are often like this everywhere. Nowadays, in various places here in Cīnasthāna there are many hot springs; by analogy, these too are boiling cauldrons. Therefore, the Dharmaguptaka-vinaya states below that the Buddha said: North of Rājagṛha there is a hot spring that comes from the hells; when it first emerges it is extremely hot, but later, flowing to distant places, it gradually cools, because there is other water mingling with it, which is why it is cool. (The above one verification is from the Xiguo zhuan.)