Dragon-palace
Legend has it that Nagarjuna recieved instruction from the Nagas (Serpent Kings) when he visited their Dragon's Palace under the sea. A great dragon bodhisattva pitied Nagarjuna like this, and with his divine power took him into the the great ocean.
Arriving at his palace, he opened seven-jeweled coffers and from them gave Nagarjuna the immeasurably wonderful dharma of the profound scriptural canon of all the vaipulyas.
Within ninety days Nagarjuna thoroughly understood a great many; his mind deeply penetrated them and he substantially obtained their true benefit.
The dragon knew his mind and asked him, “Have you read all of the scriptures or not?”
Nagarjuna answered, “Your scriptures are countless; they cannot be grasped completely. Those which I have read are already ten times [the number of scriptures in] Jambudvipa.”
The dragon king said, “In the Heaven of Thirty-three, Sakra Devanam- Indra has a billion times more scriptures than in this palace....”
At that time Nagarjuna received all the scriptures, thoroughly penetrated them and understood their single aspect.
Deeply entering birthlessness, he became endowed with the two forbearances. The dragon knew that he had been awakened to the Way, so sent him from the palace.
