《汉书·传·公孙刘田王杨蔡陈郑传》
燕苍、杜延年都因此立功封侯，杨敞身为九卿听到谋反的消息却不及时上奏，所以没有封侯。
苍、延年皆封，敞以九卿不辄言，故不得侯。
Both Yan Cang and Du Yonian were granted noble ranks for their merits, but Yang Chang, who was one of the Nine Ministers, did not report the plot in a timely manner and therefore did not receive a noble rank.