Grammar of "なかれ"


When I read the [story](http://www.douwa-
douyou.jp/contents/html/douwastory/douwastory2_05.shtml), I found "なかれ"this
word occurred several times.

> 「若い衆、知らない人を信用するで **なかれ** 。」  
>  「お前の持っていたお守りのおかげで命拾いしたのじゃ。望みすぎる **なかれ** 。ここに幸 **なかれ** 。」

I looked it up and the sentences my dictionary provide are either Verb+なかれ or
Noun+なかれ. But the first sentence above has "で" with it. Is it grammatically
correct?




> 「信用{しんよう}する **で** なかれ」

is not "grammatical". No question about it.

**_However, 「なかれ」 in this context is only used as role language for an old
male speaker in a children's story_**. A grammatical assessment of role
language, to me, is sort of like barking up the wrong tree when it is
imperative that the character must sound like an old man in a speech style
that is still understandable to children from all parts of the country.

Questionable grammar is expected of in the genre. It is just how Japanese
children's stories have developed.

If you found the phrase 「信用する **で** なかれ」 said by an adult in a writing aimed
for other adults, then a discussion on the topic would certainly be productive
and meaningful.

This time, however, it is just role language overriding fine grammar.

