《史记·十二本纪·周本纪》
长子太伯和虞仲知道古公想立季历，以便将来能传位于昌，所以两人便逃亡到了荆蛮，身刺花纹，剪短头发，而让位给季历。
长子太伯、虞仲知古公欲立季历以传昌，乃二人亡如荆蛮，文身断发，以让季历。
The eldest son Taibo and Yuzhong knew that Gu Gong wanted to establish Jili, so that he could pass the throne onto Chang, therefore the two fled to Jingman, tattooed their bodies, cut their hair and yielded to Jili.