When a brahmin priest rescues a tiger fom a cage, he is shocked when the ungrateful beast threatens to eat him.

The tiger argues that there is no reason why he shouldn't eat the brahmin because, "Humans are the most ungrateful creatures on this earth!"

The brahmin begs for his life, and the tiger agrees to spare him - but only if he can find a witness who doesn't believe that all humans are ungrateful.