《史记·三十世家·管蔡世家》
友本是灵侯太子，平侯继位后杀了隐太子友。因此平侯一死，隐太子的儿子东国就攻打平侯的儿子夺取了王位。
隐太子友者，灵侯之太子，平侯立而杀隐太子，故平侯卒而隐太子之子东国攻平侯子而代立，是为悼侯。
You was originally Crown Prince during Linghou's reign, but after Pinghou ascended to the throne, he killed Crown Prince You. Therefore, after Pinghou died, Crown Prince You's son, Dongguo, attacked Pinghou's son and seized the throne.