Who Stabbed Royal Tennenbaum?

Royal: He saved my life, you know. Thirty years ago. I was knifed at a bazaar in Calcutta, and he carried me to the hospital on his back.

Ari: Who stabbed you?

[Royal motions to Pagoda again]

Royal: He did. There was a price on my head, and he was a hired assassin. Stuck me in the gut with a shiv.