L. Frank Baum,
The Magic of Oz — Chapter 8: The Li-Mon-Eags Make Trouble
(1919)
“ We'll fight the Oz people!" screamed the Unicorn. "We'll smash 'em; we'll trample 'em; we'll gore 'em; we'll—""Silence!" growled Gugu the King, and Loo obeyed, although still trembling with wrath. The cold, steady gaze of the Leopard wandered over the two strange beasts. "The people of Oz," said he, "have not been our friends; they have not been our enemies. They have let us alone, and we have let them alone. There is no reason for war between us. They have no slaves. They could not use us as slaves if they should conquer us. ”
