The Second Jungle Book by Rudyard Kipling Chapter 15 Page 19

But he had never before interfered with a spring fight. The two leaped forward and dashed him aside, and without word to waste rolled over and over close locked.

Mowgli was on his feet almost before he fell, his knife and his white teeth were bared, and at that minute he would have killed both for no reason but that they were fighting when he wished them to be quiet, although every wolf has full right under the Law to fight. He danced round them with lowered shoulders and quivering hand, ready to send in a double blow when the first flurry of the scuffle should be over; but while he waited the strength seemed to ebb from his body, the knife-point lowered, and he sheathed the knife and watched.

“I have surely eaten poison,” he sighed at last.