《史记·三十世家·齐太公世家》
正好遇到伺候襄公穿鞋的茀，茀说： 先不要进去以免惊动宫中，惊动宫中后就不易再攻进去了。 
逢主屦茀，茀曰： 且无入惊宫，惊宫未易入也。 
They happened to meet Fu, who was waiting on Duke Xiang; Fu said: Don't go in for now, so as not to alarm them in the palace; if they're alarmed, it'll become harder to get in.