According to Mahayana tradition, the Mahayana sutras were transmitted in secret, came from other Buddhas or Bodhisattvas, or were preserved in non-human worlds because human beings at the time could not understand them: COUNT 3
QSN1 What sutras were transmitted in secret? ANS1 Mahayana QSN2 What sutras could have been preserved in non-human worlds? ANS2 Mahayana QSN3 What tradition says that sutras might have come from other Buddhas or Bodhisattvas? ANS3 Mahayana tradition