《隋书·帝纪·卷四》
而且高丽国法令苛刻严酷，赋税繁重，强臣豪族，都把持着国家的权力。他们结党营私，这已形成风俗。
且法令苛酷，赋敛烦重，强臣豪族，咸执国钧，朋党比周，以之成俗，贿货如市，冤枉莫申。
Furthermore, Goguryeo has harsh laws and heavy taxes, and powerful ministers and nobles hold all the power in the country. They form cliques for personal gain, which has become a custom.