《明史·列传·卷一百二十四》
二个奸臣每件事找人托办，一天嘱咐职方郎中杨成乔办七件事，杨成乔不听，于是他们将他赶走。
二奸每事请托，一日以七事属职方郎杨成乔。成乔不听，遂逐之去。
The two traitors asked someone to do everything for them. One day, they asked Yang Chengqiao, the assistant minister of the Ministry of War, to do seven things. Yang Chengqiao refused to do so, so they drove him away.