《明史·列传·卷七十一》
至于缴纳粟米发给盐引，又有豪门私相嘱托，大都以纳粟空名将盐引发卖，而商人要花费几倍价格。
至若输粟给盐，则豪右请托，率占虚名鬻之，而商贾费且倍蓰。
As for the collection of millet and rice to issue salt certificates, there are also wealthy families who privately entrust each other. Most of them sell the salt certificates after issuing the blank name with millet, and the merchants have to spend several times the price.