法華義疏 12.86

12.86

觸火則害人故前須持名，水則不爾；二者、自有人前持名而後遇難，自有人前遇難後稱名，所以兩存也。

Touching fire immediately harms a person, hence one must uphold the name beforehand, whereas water is not like this. Second, there naturally are people who uphold the name first and encounter the peril later, and there naturally are people who encounter the peril first and recite the name later; thus both are retained.