《三国志·吴书·周瑜鲁肃吕蒙传》
鲁肃邀请关羽相见，各自所率兵马都停留在百步之外，只请关羽及将领们单刀赴会。
肃邀羽相见，各驻兵马百步上，但请将军单刀俱会。
Lu Su invited Guan Yu to meet. The troops they led stopped a hundred steps away, and only Guan Yu and his generals were invited to attend the meeting with single swords.