《礼记·檀弓下》
孔子装作没听见的样子就走过去了，孔子的随从却说： 此人这般无礼，您还不和他绝交吗？ 孔子说： 我听说，亲人总任是亲人，老朋友总归是老朋友。 
夫子为弗闻也者而过之，从者曰： 子未可以已乎？ 夫子曰： 丘闻之：亲者毋失其为亲也，故者毋失其为故也。 
Confucius pretended not to hear and walked away, but Confucius's followers said: This person is so rude, why don't you break off relations with him? Confucius said: I heard that relatives will always be relatives, and old friends will always be old friends. 