金剛三昧經論 3.82

3.82

經曰　梵行長者言：「云何三三昧？」佛言：「三三昧者，所謂空三昧、無作三昧、無相三昧，如是三昧。」

The sūtra states: "The elder Brahmacārin said, 'What are the three samādhis?' The Buddha said, 'The three samādhis are the so-called emptiness samādhi, non-action samādhi, and signless samādhi; such are the samādhis.'"