佛祖歷代通載 9.56

9.56

（戊午）　李胤之得佛舍利遂大赦○東魏改元象東魏元象元年。有使西域。回至葱嶺。見達磨隻履單己而西還。門徒啟壙禮之唯存隻履。

(Wuwu) Li Yinzhi obtained Buddha relics, whereupon a general amnesty was proclaimed. ○ Eastern Wei changed [the era name] to Yuanxiang. In the first year of Yuanxiang of Eastern Wei, an envoy to the Western Regions, returning to the Congling Mountains, saw Bodhidharma carrying a single sandal and traveling west alone. His disciples opened his tomb and paid reverence: only the single sandal remained.