מדרש על דניאל 2:11

And there is none other (aharan) (Dan. 2:11). It should have been written “there is no Aaron” (aharon). While the Temple stood, a man could go to one of Aaron’s descendants to consult the Urim and Thummin for answers to their questions, but now there is no Temple and no Urim and Thummin to consult.