Blood

“He is our brother in all but blood,” Akela went on, “and ye would kill him here!

Because I was all but your brother in blood, I promise that when I am a man among men I will not betray ye to men as ye have betrayed me.” He kicked the fire with his foot, and the sparks flew up.

“We be of one blood, ye and I,” said Mowgli, giving the words the Bear accent which all the Hunting People use.

“And then, and then, they gave me nuts and pleasant things to eat, and they--they carried me in their arms up to the top of the trees and said I was their blood brother except that I had no tail, and should be their leader some day.”