《资治通鉴·唐纪·唐纪五十七》
夏侯澄仔细看后，大声痛哭了很久，悲痛欲绝，接着，将李师道首级捧起，用舌尖舐净眼睛中的灰尘，然后又大声哭泣。
澄熟视其面，长号陨绝者久之，乃抱其首，舐其目中尘垢，复恸哭。
After carefully examining the head, Xiahou Cheng loudly and bitterly burst into tears for a long while. Then he held up Li Shidao’s head and licked off the dust from his eyes. After that, he again loudly cried.