《北史·列传·卷三十八》
 现在，天下寇乱没有平息，四方的边境战争不断，赋税烦苛，日费千金。仓库的储蓄渐渐耗尽，国家的财用行将枯竭，实在是到了杨氏献税、桑儿言利的时候了。
今群妖未息，四郊多垒，徵税既烦，千金日费，仓储渐耗，财用将竭，诚杨氏献税之秋，桑兒言利之日。
Now, the chaos in the world has not subsided, the wars on all sides continue, the taxes are harsh, and the daily expenses are thousands of gold. The reserves in the warehouses are gradually being depleted, and the state's finances are about to run out. It is really time for the Yang clan to pay taxes and Sang'er to speak out for profit.