《明史·列传·卷三十六》
兹创制 杨贞一印 赐给爱卿。尚望努力修身，以成就英明贤良之美誉。 
兹创制 杨贞，一印赐卿，尚克交修，以成明良之誉。 
Create the "Yang Zhenyi Seal" and give it to Aqing. I hope to work hard to cultivate morality and achieve the reputation of being wise and virtuous.