《三字经·全文》
战国时苏秦读书每到疲倦时就用锥子刺大腿，他们不用别人督促而自觉勤奋苦读。
苏老泉，二十七。始发奋，读书籍。
During the Warring States Period, Su Qin prickled his thigh with a sewing needle when he felt exhausted, and they studied hard without being supervised 