《史记·三十世家·绛侯周勃世家》
周勃身为太尉，却不能进入军营之门；陈平身为丞相，却不能处理政务。
勃为太尉，不得入军门。陈平为丞相，不得任事。
Zhou Bo was the Grand Marshal, but he could not enter the gate of the military camp; Chen Ping was the Prime Minister, but he could not handle government affairs.