《汉书·传·西南夷两粤朝鲜传》
高后亲理国政后，接近小人，听信谗臣之言，视蛮夷为异类，发布命令说： 不给蛮夷之南粤国铁器等金属农具；如果给马、牛、羊，则衹给雄的，不给雌的。 
高后自临用事，近细士，信谗臣，别异蛮夷，出令曰： 毋予蛮夷外粤金铁田器；马、牛、羊即予，予牡，毋与牝。 
After the empress dowager personally took charge of the government, she approached villains, listened to treacherous ministers' words, regarded barbarians as aliens, and issued orders: "Don't give iron tools and other metal farm tools to the Southern Yue of barbarians; if horses, cattle, and sheep are given, only give males but not females. "