Huckleberry Finn

From the text:

 It swore every boy to stick to the band, and never tell any of the secrets; and if anybody done anything to any boy in the band, whichever boy was ordered to kill that person and his family must do it, and he mustn't eat and he mustn't sleep till he had killed them and hacked a cross in their breasts, which was the sign of the band. And nobody that didn't belong to the band could use that mark, and if he did he must be sued; and if he done it again he must be killed.  And if anybody that belonged to the band told the secrets, he must have his throat cut, and then have his carcass burnt up and the ashes scattered all around, and his name blotted off of the list with blood and never mentioned again by the gang, but have a curse put on it and be forgot forever.