《新唐书·列传·卷七十》
请求把京城西边的军队调去驻守原州，乘机会筑城堡，二十天可以筑好，储存一年的粮食。
请徙京西军戍原州，乘间筑作，二旬可讫，贮粟一岁。
It is requested that the army in the west of the capital be transferred to Yuanzhou to be stationed, and take the opportunity to build a castle, which can be completed in 20 days and store a year's worth of grain.