大唐西域記 1.108

1.108

石室西二三里大山嶺上有觀自在菩薩像，有人至誠願見者，菩薩從其像中出妙色身，安慰行者。

Above a mountain pass to the north of this convent there are several stone chambers; it was in these the hostages practised religious meditation. In these recesses many and various gems (precious things) are concealed: on the side there is an inscription that the Yakshas (Yo-cha) guard and defend the places (precincts). If any one wishes to enter and rob the treasures, the Yakshas by spiritual transformation appear in different forms, sometimes as lions, sometimes as snakes, and as savage beasts and poisonous reptiles; under various appearances they exhibit their rage. So no one dares to attempt to take the treasures. At 2 or 3 li to the west of the stone chambers, above a great mountain pass, there is a figure of Kwan-tsz'-tsai Bodhisattva; those who with sincere faith desire (vow or pray) to see him, to them the Bodhisattva appears coming forth from the image, his body of marvellous beauty, and he gives rest and reassurance to the travellers.