《逸周书·卷六·时训解》
班鸠不擦摩翅膀，国家不能治军。戴胜鸟不落桑树上，政令教化会落空。
鸣鸠不拂其羽，国不治；戴胜不降于桑，政教不中。
If the turtledove does not rub its wings, the country will not be able to govern the army. If the hoopoe does not land on the mulberry tree, the government's teachings will be ineffective.