Making of a Saying

closer but it doesn't rhyme and doesn't have any meaning in English

No crime, no punishment.


That would only work though, if people had heard of the book "Crime and Punishment."

that's closer to a pun than an idiom, but it could definitely work for literate readers

This all goes to show that good sayings are hard to invent, combining as they do wit, humour and folk wisdom.

Well guys, thank you for paying attention.
Would you like to introduce some says that are popular in English cyberspace invented nowadays?

The closest phrases I can think of are either, Live and let live, or He who lives by the sword dies by the sword. Neither deal specifically with the slaughter of innocents though.

I am not a native speaker, but major in English. In my opinion, there are some thing wrong with you saying. First, what the meaning of death knell? By the way,it maybe not rhyme.