The current “plagiarism” template for moderator messages (minus lead-in and fade-out, but including original emphasis) is:
It has come to our attention that several of your answers consisted primarily or entirely of text copied from other answers or websites. We prefer not to simply copy content already available elsewhere in lieu of creating something that adds value to this site specifically.
Whenever possible, we prefer that posts be your own original work, but when a great answer already exists elsewhere, including a small passage of text from another source can be a great way to support your solution. But please note that we require full attribution with a link to the original author, and please be sure you are not copying content without permission.
Thank you, and I look forward to your contributions in the future.
Please add a link to /help/referencing
somewhere.
Also, I think the word plagiarism should be present in the mod message itself.