Moby Dick by Herman Melville Chapter 100 Page 18

— very gravely and mathematically bowing to each Captain in succession — “Do you know, gentlemen, that the digestive organs of the whale are so inscrutably constructed by Divine Providence, that it is quite impossible for him to completely digest even a man’s arm?

And he knows it too. So that what you take for the White Whale’s malice is only his awkwardness. For he never means to swallow a single limb; he only thinks to terrify by feints. But sometimes he is like the old juggling fellow, formerly a patient of mine in Ceylon, that making believe swallow jack-knives, once upon a time let one drop into him in good earnest, and there it stayed for a twelvemonth or more; when I gave him an emetic, and he heaved it up in small tacks, d’ye see. No possible way for him to digest that