不食马肝

Explanation: According to legend, horse liver toxic, the food can be fatal. Analogy should not discuss things not to discuss. 　　Usage: Verb-object type; for the predicate; analogy should not discuss a matter not of 　　Source: Han Ban Gu "Han House solid mass": "the Master said: 'flesh-eating horses not eat the liver, not as I do not know taste also; statement made by Tang Wu ordered not scholars, not stupid'." 　　Examples: When the palace of the suspect who study the so-called ~, not as I do not know taste. (Qing Chen Li, "The Analects of Confucius Dongshu secretary read")