折疑論 4.158

4.158

吾不知。聃師竺乾。善入無為（吾於昔年未明其事。不知聃龍師竺乾。善能入無為者。即佛也）。

'I did not know that Dan took India as his master, skillfully entering non-action.' (In former years I did not understand this matter, and did not know that the dragon Dan took India as his master; the one who could skillfully enter non-action is precisely the Buddha.)