《北史·列传·卷五》
元匡是宗室贤明之士，留心研究时久，可让再次聚合儒者贤士，因时加以检验决断，务必使权衡适中，没有差错。 
匡宗室贤亮，留心既久，可令更集儒贵，以时验决。必务权衡得衷，令寸籥不舛。 
Yuan Kuang is a wise man from the imperial clan who has long devoted himself to research; you may let him to gather the virtuous and wise Confucian scholars again, and decide by examining the time factor, and make sure that the weights and measures are appropriate without errors.