注維摩詰經 7.50

7.50

肇曰：津河可度處名正濟，險難處名邪濟。佛道名正濟，外道名邪濟也。

[Seng]zhao says: A place where a ford or river can be crossed is called a correct crossing; a dangerous and difficult place is called a heterodox crossing. The Buddha's path is named the correct crossing, while non-Buddhist paths are named heterodox crossings.