开柙出虎

Explanation: Pen: the wooden cage off beast. Originally referred to the person responsible for care not entirely responsible. Bad metaphor after more than indulgence. 　　Usage: -Linked; as object; indulge bad analogy 　　Source: Pre Confucius "The Analects of Confucius Jishi": "Confucius said: '... ... Fu SI for pen, turtle jade destroyed casket, is Shui Zhiguo with?'" 　　Examples: ~, Kongxuan parent is not responsible for others; when the road cut snake, Sun Shuao cover non-self-serving. (Mingling 濛 early "first moment Pai An Jing Qi" Volume XII)