《晋书·志·第十六章》
晋元帝身为晋王的时候，检查督促农业生产，下令二千石长吏们根据交纳粮食的多少来排座次。
元帝为晋王，课督农功，诏二千石长吏以入谷多少为殿最。
When Emperor Yuan of Jin was King of Jin, he inspected and supervised agricultural production and ordered the 2,000-stone governor to rank according to the amount of grain paid.