Book 15: 《衛靈公》 Wei Ling Gong (Duke Ling of Wey)
《衛靈公》 Passage 15.1
衛靈公問陳於孔子。孔子對曰：「俎豆之事，則嘗聞之矣；軍旅之事，未之學也。」明日遂行。
Legge Translation (1861)
The Duke Ling of Wei asked Confucius about military tactics. Confucius replied: "I have heard all about sacrificial vessels, but I have not learned military matters."On this, he took his departure the next day.