I remember the tale.

On that, then, he goes to Fannatu l'Adn [the Gardens of Eden].
But how?
Wilt thou slay him or drown him in that wonderful river from which the Babu dragged thee ?' 'I was dragged from no river,' said the lama simply.

'Thou hast forgotten what befell.

I found it by Knowledge.' 'Oh, ay.

True,' stammered Mahbub, divided between high indignation and enormous mirth.