《笑林广记·术业部》
有个按院得了病，请医生来看病，医生十分担心害怕，诊脉时错按在病人的手背上。
一按院患病，接医诊视之。医惊持畏缩，错看了手背。
An inspector fell ill and asked a doctor to see him. The doctor was very worried and scared. When he checked his pulse, he accidentally pressed the back of the patient's hand.