context: 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:
question: কোন সূত্রগুলো গোপনে প্রেরণ করা হয়েছিল?
answers: Mahayana