《资治通鉴·汉纪·汉纪五十六》
焦触自称幽州刺史，胁迫所属各郡、县的长官，都背叛袁氏，归顺曹操。焦触等集结数万人的部队，杀死白马，歃血为盟，下令说： 有敢于违抗者，一律斩首。 
触自号幽州刺史，驱率诸郡太守令长，背袁向曹，陈兵数万，杀白马而盟，令曰： 敢违者斩！ 
Jiao Tu declared himself governor of You and forced all the local commandants and county leaders into submission. They all abandoned the Yuan family and vowed loyalty to Cao Cao. Jiao Tu gathered a force of several tens of thousands of men and led them in a ceremony to kill a white horse and drink its blood. He then gave orders that anyone who dared to defy them would be executed.