《后汉书·列传·朱景王杜马刘傅坚马列》
王莽时举四科，景丹以言语科被举为固德侯相，被称誉为有干事才能，迁为朔调连率副贰。
王莽时举四科，丹以言语为固德侯相，有干事称，迁朔调连率副贰。
 During Wang Mang's time, he carried out the four levels of examinations. Jing Dan was recommended for his oratory skills to be a minister for Marquis of Guder. He was praised for his competence in handling affairs and was then moved to become deputy to the Joint Commander of the Pacification and Recruitment Corps.