大唐西域記 2.38

2.38

伽藍西南，深㵎陗絕，瀑布飛流，懸崖壁立。東崖石壁有大洞穴，瞿波羅龍之所居也。門徑狹小，窟穴冥闇，崖石津滴，磎徑餘流。昔有佛影，煥若真容，相好具足，儼然如在。近代已來，人不遍覩，縱有所見，髣髴而已。至誠祈請，有冥感者，乃暫明視，尚不能久。昔如來在世之時，此龍為牧牛之士，供王乳酪，進奉失宜；既獲譴責，心懷恚恨，即以金錢買華，供養受記窣堵波，願為惡龍，破國害王。即趣石壁，投身而死；遂居此窟，為大龍王，便欲出穴，成本惡願。適起此心，如來已鑒，愍此國人為龍所害，運神通力，自中印度至。龍見如來，毒心遂止，受不殺戒，願護正法。因請如來：「常居此窟，諸聖弟子，恒受我供。」如來告曰：「吾將寂滅，為汝留影，遣五羅漢常受汝供。正法隱沒，其事無替。汝若毒心奮怒，當觀吾留影，以慈善故，毒心當止。此賢劫中，當來世尊，亦悲愍汝，皆留影像。」

To the south-west of this sanghârâma a deep torrent rushes from a high point of the hill and scatters its waters in leaping cascades. The mountain sides are like walls ; on the eastern side of one is a great cavern, deep and profound, the abode of the Nâga Gôpâla. The gate (or entrance) leading to it is narrow ; the cavern is dark ; the precipitous rock causes the water to find its way in various rivulets into this cavern. In old days there was a shadow of Buddha to be seen here, bright as the true form, with all its characteristic marks. In later days men have not seen it so much. What does appear is only a feeble likeness. But whoever prays with fervent faith, he is mysteriously endowed, and he sees it clearly before him, though not for long.

In old times, when Tathâgata was in the world, this [dragon] was a shepherd who provided the king with milk and cream. Having on one occasion failed to do so, and having received a reprimand, he proceeded in an angry temper to the stûpa of "the predictive assurance," and there made an offering of flowers, with the prayer that he might become a destructive dragon for the purpose of afflicting the country and destroying the king. Then ascending the rocky side of the hill, he threw himself down and was killed. Forthwith he became a great dragon and occupied this cavern, and then he purposed to go forth and accomplish his original wicked purpose. When this intention had risen within him, Tathagata, having examined what was his object, was moved with pity for the country and the people about to be destroyed by the dragon. By his spiritual power he came from Mid-India to where the dragon was. The dragon seeing Tathagata, his murderous purpose was stayed, and he accepted the precept against killing, and vowed to defend the true law ; he requested Tathagata to occupy this cavern evermore, that his holy disciples might ever receive his (the dragon's) religious offerings.

Tathagata replied, "When I am about to die; I will leave you my shadow, and I will send five Arhats to receive from you continual offerings. When the true law is destroyed, this service of yours shall still go on ; if an evil heart rises in you, you must look at my shadow, and because of its power of love and virtue your evil purpose will be stopped. The Buddhas who will appear throughout this Bhadra-kalpa will all, from a motive of pity, intrust to you their shadows as a bequest." Outside the gate of the Cavern of the Shadow there are two square stones; on one is the impression of the foot of Tathagata, with a wheel-circle (lun-siang) beautifully clear, which shines with a brilliant light from time to time. On either side of the Cavern of the Shadow there are several stone chambers; in these the holy disciples of Tathagata reposed in meditation. At the north-west corner of the cave of the shadow is a stupa where Buddha walked up and down. Beside this is a stupa which contains some of the hair and the nail-parings of Tathagata. Not far from this is a stupa where Tathagata, making manifest the secret principles of his true doctrine, declared the Skandha-dhatu-ayatanas (Yun-kiai-king). At the west of the Cave of the Shadow is a vast rock, on which Tathagata in old time spread out his kashaya robe after washing it; the marks of the tissue still exist.