法苑珠林 28.16

28.16

又善信經云。有神藥樹。名曰摩羅陀祇。主厭天下萬毒不得妄行。有大神蛇。身長一百二十尺。蛇行索食。有黑頭蟲。身長五丈。蟲行道中與蛇相逢。適欲舉頭前齧大蟲。蛇聞藥香屈頭欲走。蛇身羅藥樹身即中斷。分作兩段。頭半生得走。尾便臭爛。諸毒聞此蛇臭。眾惡毒氣皆悉消滅。

The Shanxin jing also states: There is a divine medicinal tree named moluotuoji, which is sovereign in suppressing all the ten thousand poisons under heaven, preventing them from acting wildly. There was a great divine serpent, one hundred and twenty spans long. The serpent traveled looking for food. There was a black-headed worm, five zhang long. The worm, traveling on the road, encountered the serpent. Just as the serpent was about to raise its head to bite the large worm, it smelled the medicinal fragrance and bent its head, wanting to flee. The serpent's body brushed against the medicinal tree, and its body snapped in the middle, breaking into two pieces. The head half fled alive, while the tail half rotted with a foul stench. When all poisons smelled the stench of this serpent, the evil poisonous vapors of all of them were entirely extinguished.