《元史·列传·卷九十二》
臣等已责成各官增加旧有的税额二十倍，将来如有不按额纳税的，就重治其罪。 
臣等已责各官增旧课二十倍，后有不如数者，重其罪。 
We have asked the officials to increase the old tax amount by 20 times. In the future, those who fail to pay taxes on time will be punished severely.