《明史·志·卷五十四》
遇了二年，又命令户部侍郎杨靖计算天下仓储的存粮，二年外一并收折色，只有北方各布政司需要粮食供应边防，仍然使之缴纳粮食。
越二年，又令户部侍郎杨靖会计天下仓储存粮，二年外并收折色，惟北方诸布政司需粮饷边，仍使输粟。
When two years are encountered, the Ministry of Household Affairs is ordered to calculate the storage of the world's granaries, and all the deductions within two years are collected, only the various chief administration offices in the north need a food supply for border defense, and they are still required to pay for food.