一切經音義 99.166

99.166

蹠實（征石反淮南子云鳥排空而飛獸蹠實而走也許叔重注云蹠蹈也又曰行也或作蹠字集從庶作蹠非）。

Treading on solid ground (蹠實) (zhi pronounced with the fanqie 征石 [zhēng + shí = zhí]: the Huainanzi says, "Birds fly cleaving the void; beasts run treading on the solid." Xu Shuzhong's commentary says, "蹠 means to step on; it also means to walk." It is also written as 蹠; the Collected [Edition] writes it with 庶 as 蹠, which is incorrect).