宋高僧傳 19.25

19.25

次有木𣹟師者，多遊京邑市鄽間，亦類封干，人莫輕測。「封」、「豐」二字，出沒不同——韋述史官作「封疆」之「封」，閭丘序三賢作「豐稔」之「豐」，未知孰是。

Next was Master Muhe, who mostly wandered about the markets and wards of the capital. He was also similar to Fenggan, and people could not easily fathom him. The two characters "Feng" (封) and "Feng" (豐) appeared inconsistently in records: the official historian Wei Shu used the "Feng" of "fengjiang" (封疆, border territories), while Lüqiu's preface on the Three Worthies used the "Feng" of "fengren" (豐稔, abundant harvest); it is not known which is correct.