《战国策·韩二·楚围雍氏韩令冷向借救》
司马康三次往反到楚阁的郢都，甘茂又同昭献在边境上会面，他们声称楚国收回了军印，不再攻打韩国，其实在这背后仍有盟约。 
司马康三反之郢矣，甘茂与昭献遇于境，其言曰收玺，其实犹有约也。 
Sima Kang has traveled back and forth to Chu's capital Ying three times, and Gan Mao met Zhao Xian at the borders. They claimed that Chu has called back its military insignia and will stop its campaign against Han, but there is an alliance in secrecy.