《左传·昭公·昭公九年》
文王、武王、成王、康王建立同母兄弟的国家，用来护卫周室，也是为了防止周室的毁坏衰落，难道只是像不用的东西因而就抛弃了它？
文、武、成、康之建母弟，以蕃屏周，亦其废队是为，岂如弁髦而因以敝之。
King Wen, King Wu, King Cheng, and King Kang established states for the brothers with the same mother, used them to protect Zhou, and prevented the decline and ruin of Zhou. Have they been discarded like unneeded things?